28540372 has 24 divisors (see below), whose sum is σ = 57866816. Its totient is φ = 12063168.

The previous prime is 28540361. The next prime is 28540411. The reversal of 28540372 is 27304582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4938 + ... + 9025.

Almost surely, 2^28540372 is an apocalyptic number.

It is an amenable number.

28540372 is an abundant number, since it is smaller than the sum of its proper divisors (29326444).

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

28540372 is a wasteful number, since it uses less digits than its factorization.

28540372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14047 (or 14045 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 28540372 is about 5342.3189721319. The cubic root of 28540372 is about 305.5999014327.

The spelling of 28540372 in words is "twenty-eight million, five hundred forty thousand, three hundred seventy-two".