28457100 has 108 divisors (see below), whose sum is σ = 101962224. Its totient is φ = 6503040.

The previous prime is 28457089. The next prime is 28457113. The reversal of 28457100 is 175482.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4042 + ... + 8558.

Almost surely, 2^28457100 is an apocalyptic number.

28457100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28457100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50981112).

28457100 is an abundant number, since it is smaller than the sum of its proper divisors (73505124).

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

28457100 is a wasteful number, since it uses less digits than its factorization.

28457100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4544 (or 4534 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28457100 is about 5334.5196597257. The cubic root of 28457100 is about 305.3023964935.

The spelling of 28457100 in words is "twenty-eight million, four hundred fifty-seven thousand, one hundred".