28890735 has 64 divisors (see below), whose sum is σ = 52876800. Its totient is φ = 13381632.

The previous prime is 28890731. The next prime is 28890739. The reversal of 28890735 is 53709882.

It is an interprime number because it is at equal distance from previous prime (28890731) and next prime (28890739).

It is not a de Polignac number, because 28890735 - 2² = 28890731 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28890731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 324571 + ... + 324659.

It is an arithmetic number, because the mean of its divisors is an integer number (826200).

Almost surely, 2^28890735 is an apocalyptic number.

28890735 is a deficient number, since it is larger than the sum of its proper divisors (23986065).

28890735 is a wasteful number, since it uses less digits than its factorization.

28890735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 28890735 is about 5375.0102325484. The cubic root of 28890735 is about 306.8453386712.

The spelling of 28890735 in words is "twenty-eight million, eight hundred ninety thousand, seven hundred thirty-five".