28917492 has 12 divisors (see below), whose sum is σ = 67474176. Its totient is φ = 9639160.

The previous prime is 28917481. The next prime is 28917503. The reversal of 28917492 is 29471982.

It is an interprime number because it is at equal distance from previous prime (28917481) and next prime (28917503).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204884 + ... + 1204907.

It is an arithmetic number, because the mean of its divisors is an integer number (5622848).

Almost surely, 2^28917492 is an apocalyptic number.

It is an amenable number.

28917492 is an abundant number, since it is smaller than the sum of its proper divisors (38556684).

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

28917492 is a wasteful number, since it uses less digits than its factorization.

28917492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409798 (or 2409796 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 28917492 is about 5377.4986750347. The cubic root of 28917492 is about 306.9400371665.

The spelling of 28917492 in words is "twenty-eight million, nine hundred seventeen thousand, four hundred ninety-two".