28797132 has 48 divisors (see below), whose sum is σ = 82702592. Its totient is φ = 7594560.

The previous prime is 28797101. The next prime is 28797149. The reversal of 28797132 is 23179782.

It is a super-2 number, since 2×28797132² = 1658549622850848, which contains 22 as substring.

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

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, 12094 + ... + 14277.

Almost surely, 2^28797132 is an apocalyptic number.

It is an amenable number.

28797132 is an abundant number, since it is smaller than the sum of its proper divisors (53905460).

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

28797132 is a wasteful number, since it uses less digits than its factorization.

28797132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26398 (or 26396 counting only the distinct ones).

The product of its digits is 42336, while the sum is 39.

The square root of 28797132 is about 5366.2959292234. The cubic root of 28797132 is about 306.5135977333.

It can be divided in two parts, 2879 and 7132, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 28797132 in words is "twenty-eight million, seven hundred ninety-seven thousand, one hundred thirty-two".