28642700 has 18 divisors (see below), whose sum is σ = 62154876. Its totient is φ = 11457040.

The previous prime is 28642697. The next prime is 28642703. The reversal of 28642700 is 724682.

It is an interprime number because it is at equal distance from previous prime (28642697) and next prime (28642703).

It is not an unprimeable number, because it can be changed into a prime (28642703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 143114 + ... + 143313.

Almost surely, 2^28642700 is an apocalyptic number.

28642700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28642700 is an abundant number, since it is smaller than the sum of its proper divisors (33512176).

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

28642700 is a wasteful number, since it uses less digits than its factorization.

28642700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286441 (or 286434 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 28642700 is about 5351.8875175026. The cubic root of 28642700 is about 305.9646961136.

The spelling of 28642700 in words is "twenty-eight million, six hundred forty-two thousand, seven hundred".