28970090 has 16 divisors (see below), whose sum is σ = 52807680. Its totient is φ = 11441040.

The previous prime is 28970083. The next prime is 28970093. The reversal of 28970090 is 9007982.

It is a super-2 number, since 2×28970090² = 1678532229216200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28970090.

It is not an unprimeable number, because it can be changed into a prime (28970093) 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, 17546 + ... + 19125.

It is an arithmetic number, because the mean of its divisors is an integer number (3300480).

Almost surely, 2^28970090 is an apocalyptic number.

28970090 is a deficient number, since it is larger than the sum of its proper divisors (23837590).

28970090 is a wasteful number, since it uses less digits than its factorization.

28970090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36757.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 28970090 is about 5382.3870169285. The cubic root of 28970090 is about 307.1260221013.

The spelling of 28970090 in words is "twenty-eight million, nine hundred seventy thousand, ninety".