28437972 has 12 divisors (see below), whose sum is σ = 66355296. Its totient is φ = 9479320.

The previous prime is 28437931. The next prime is 28437977. The reversal of 28437972 is 27973482.

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 (28437977) 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, 1184904 + ... + 1184927.

It is an arithmetic number, because the mean of its divisors is an integer number (5529608).

Almost surely, 2^28437972 is an apocalyptic number.

It is an amenable number.

28437972 is an abundant number, since it is smaller than the sum of its proper divisors (37917324).

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

28437972 is a wasteful number, since it uses less digits than its factorization.

28437972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2369838 (or 2369836 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 28437972 is about 5332.7265071444. The cubic root of 28437972 is about 305.2339761557.

The spelling of 28437972 in words is "twenty-eight million, four hundred thirty-seven thousand, nine hundred seventy-two".