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1904485812 = 223158707151
BaseRepresentation
bin111000110000100…
…0010010110110100
311220201121220101120
41301201002112310
512400022021222
6512551423540
765123601525
oct16141022664
94821556346
101904485812
1189803a419
12451984bb0
132447445a8
14140d1484c
15b22e715c
hex718425b4

1904485812 has 12 divisors (see below), whose sum is σ = 4443800256. Its totient is φ = 634828600.

The previous prime is 1904485799. The next prime is 1904485853. The reversal of 1904485812 is 2185844091.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79353564 + ... + 79353587.

It is an arithmetic number, because the mean of its divisors is an integer number (370316688).

Almost surely, 21904485812 is an apocalyptic number.

1904485812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1904485812 is an abundant number, since it is smaller than the sum of its proper divisors (2539314444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1904485812 is a wasteful number, since it uses less digits than its factorization.

1904485812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158707158 (or 158707156 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 1904485812 is about 43640.4148926199. The cubic root of 1904485812 is about 1239.5362929695.

The spelling of 1904485812 in words is "one billion, nine hundred four million, four hundred eighty-five thousand, eight hundred twelve".

Divisors: 1 2 3 4 6 12 158707151 317414302 476121453 634828604 952242906 1904485812