28137452 has 24 divisors (see below), whose sum is σ = 56779296. Its totient is φ = 11950848.

The previous prime is 28137451. The next prime is 28137479. The reversal of 28137452 is 25473182.

It is not an unprimeable number, because it can be changed into a prime (28137451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1283 + ... + 7610.

It is an arithmetic number, because the mean of its divisors is an integer number (2365804).

Almost surely, 2^28137452 is an apocalyptic number.

It is an amenable number.

28137452 is an abundant number, since it is smaller than the sum of its proper divisors (28641844).

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

28137452 is a wasteful number, since it uses less digits than its factorization.

28137452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9017 (or 9015 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 28137452 is about 5304.4747148045. The cubic root of 28137452 is about 304.1549735001.

The spelling of 28137452 in words is "twenty-eight million, one hundred thirty-seven thousand, four hundred fifty-two".