28557492 has 12 divisors (see below), whose sum is σ = 66634176. Its totient is φ = 9519160.

The previous prime is 28557491. The next prime is 28557493. The reversal of 28557492 is 29475582.

It is an interprime number because it is at equal distance from previous prime (28557491) and next prime (28557493).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28557491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1189884 + ... + 1189907.

It is an arithmetic number, because the mean of its divisors is an integer number (5552848).

Almost surely, 2^28557492 is an apocalyptic number.

It is an amenable number.

28557492 is an abundant number, since it is smaller than the sum of its proper divisors (38076684).

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

28557492 is a wasteful number, since it uses less digits than its factorization.

28557492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379798 (or 2379796 counting only the distinct ones).

The product of its digits is 201600, while the sum is 42.

The square root of 28557492 is about 5343.9210323507. The cubic root of 28557492 is about 305.6609941256.

The spelling of 28557492 in words is "twenty-eight million, five hundred fifty-seven thousand, four hundred ninety-two".