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28470705 = 351898047
BaseRepresentation
bin110110010011…
…0110110110001
31222120110110120
41230212312301
524242030310
62454120453
7463665654
oct154466661
958513416
1028470705
111508650a
129650129
135b8ab93
143ad189b
152775b70
hex1b26db1

28470705 has 8 divisors (see below), whose sum is σ = 45553152. Its totient is φ = 15184368.

The previous prime is 28470703. The next prime is 28470707. The reversal of 28470705 is 50707482.

It is an interprime number because it is at equal distance from previous prime (28470703) and next prime (28470707).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28470705 - 21 = 28470703 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28470703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 949009 + ... + 949038.

It is an arithmetic number, because the mean of its divisors is an integer number (5694144).

Almost surely, 228470705 is an apocalyptic number.

It is an amenable number.

28470705 is a deficient number, since it is larger than the sum of its proper divisors (17082447).

28470705 is a wasteful number, since it uses less digits than its factorization.

28470705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898055.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 28470705 is about 5335.7946924521. The cubic root of 28470705 is about 305.3510425530.

The spelling of 28470705 in words is "twenty-eight million, four hundred seventy thousand, seven hundred five".

Divisors: 1 3 5 15 1898047 5694141 9490235 28470705