28942680 has 64 divisors (see below), whose sum is σ = 93512160. Its totient is φ = 7123968.

The previous prime is 28942663. The next prime is 28942699. The reversal of 28942680 is 8624982.

28942680 = T₉₁₁ + T₉₁₂ + ... + T₉₇₅.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 7717 + ... + 10836.

Almost surely, 2^28942680 is an apocalyptic number.

28942680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28942680 is an abundant number, since it is smaller than the sum of its proper divisors (64569480).

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

28942680 is a wasteful number, since it uses less digits than its factorization.

28942680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18580 (or 18576 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 28942680 is about 5379.8401463241. The cubic root of 28942680 is about 307.0291292869.

The spelling of 28942680 in words is "twenty-eight million, nine hundred forty-two thousand, six hundred eighty".