28975078 has 32 divisors (see below), whose sum is σ = 49911552. Its totient is φ = 12487200.

The previous prime is 28974989. The next prime is 28975081. The reversal of 28975078 is 87057982.

28975078 is a nontrivial binomial coefficient, being equal to C(7613, 2).

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87373 + ... + 87703.

It is an arithmetic number, because the mean of its divisors is an integer number (1559736).

Almost surely, 2^28975078 is an apocalyptic number.

28975078 is the 7612-nd triangular number.

28975078 is the 2538-th centered nonagonal number.

28975078 is a deficient number, since it is larger than the sum of its proper divisors (20936474).

28975078 is a wasteful number, since it uses less digits than its factorization.

28975078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 28975078 is about 5382.8503601716. The cubic root of 28975078 is about 307.1436478282.

It can be divided in two parts, 28 and 975078, that added together give a triangular number (975106 = T₁₃₉₆).

The spelling of 28975078 in words is "twenty-eight million, nine hundred seventy-five thousand, seventy-eight".