28551132 has 36 divisors (see below), whose sum is σ = 72401056. Its totient is φ = 9486720.

The previous prime is 28551101. The next prime is 28551139. The reversal of 28551132 is 23115582.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 28551096 and 28551105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12132 + ... + 14292.

Almost surely, 2^28551132 is an apocalyptic number.

It is an amenable number.

28551132 is an abundant number, since it is smaller than the sum of its proper divisors (43849924).

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

28551132 is a wasteful number, since it uses less digits than its factorization.

28551132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538 (or 2533 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 28551132 is about 5343.3259305418. The cubic root of 28551132 is about 305.6383013268.

The spelling of 28551132 in words is "twenty-eight million, five hundred fifty-one thousand, one hundred thirty-two".