28477790 has 32 divisors (see below), whose sum is σ = 57439584. Its totient is φ = 10074240.

The previous prime is 28477781. The next prime is 28477807. The reversal of 28477790 is 9777482.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 572 + ... + 7568.

It is an arithmetic number, because the mean of its divisors is an integer number (1794987).

Almost surely, 2^28477790 is an apocalyptic number.

28477790 is an abundant number, since it is smaller than the sum of its proper divisors (28961794).

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

28477790 is a wasteful number, since it uses less digits than its factorization.

28477790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7052.

The product of its (nonzero) digits is 197568, while the sum is 44.

The square root of 28477790 is about 5336.4585635045. The cubic root of 28477790 is about 305.3763695538.

The spelling of 28477790 in words is "twenty-eight million, four hundred seventy-seven thousand, seven hundred ninety".