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28313478 = 2323150741
BaseRepresentation
bin110110000000…
…0011110000110
31222021110210100
41230000132012
524222012403
62450504530
7462442404
oct154003606
958243710
1028313478
1114a89376
129595146
135b3444b
143a90474
1527442a3
hex1b00786

28313478 has 24 divisors (see below), whose sum is σ = 63326016. Its totient is φ = 9133200.

The previous prime is 28313443. The next prime is 28313503. The reversal of 28313478 is 87431382.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24813 + ... + 25928.

It is an arithmetic number, because the mean of its divisors is an integer number (2638584).

Almost surely, 228313478 is an apocalyptic number.

28313478 is an abundant number, since it is smaller than the sum of its proper divisors (35012538).

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

28313478 is a wasteful number, since it uses less digits than its factorization.

28313478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50780 (or 50777 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 28313478 is about 5321.0410635514. The cubic root of 28313478 is about 304.7879131132.

The spelling of 28313478 in words is "twenty-eight million, three hundred thirteen thousand, four hundred seventy-eight".

Divisors: 1 2 3 6 9 18 31 62 93 186 279 558 50741 101482 152223 304446 456669 913338 1572971 3145942 4718913 9437826 14156739 28313478