28805755 has 8 divisors (see below), whose sum is σ = 37709424. Its totient is φ = 20949600.

The previous prime is 28805741. The next prime is 28805761. The reversal of 28805755 is 55750882.

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

It is not a de Polignac number, because 28805755 - 2⁷ = 28805627 is a prime.

It is a super-2 number, since 2×28805755² = 1659543042240050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261816 + ... + 261925.

It is an arithmetic number, because the mean of its divisors is an integer number (4713678).

Almost surely, 2^28805755 is an apocalyptic number.

28805755 is a deficient number, since it is larger than the sum of its proper divisors (8903669).

28805755 is a wasteful number, since it uses less digits than its factorization.

28805755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523757.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 28805755 is about 5367.0993096830. The cubic root of 28805755 is about 306.5441887772.

The spelling of 28805755 in words is "twenty-eight million, eight hundred five thousand, seven hundred fifty-five".