28372532 has 12 divisors (see below), whose sum is σ = 49690116. Its totient is φ = 14175360.

The previous prime is 28372517. The next prime is 28372559. The reversal of 28372532 is 23527382.

It can be written as a sum of positive squares in 2 ways, for example, as 26666896 + 1705636 = 5164^2 + 1306^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6908 + ... + 10220.

It is an arithmetic number, because the mean of its divisors is an integer number (4140843).

Almost surely, 2^28372532 is an apocalyptic number.

It is an amenable number.

28372532 is a deficient number, since it is larger than the sum of its proper divisors (21317584).

28372532 is a wasteful number, since it uses less digits than its factorization.

28372532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5458 (or 5456 counting only the distinct ones).

The product of its digits is 20160, while the sum is 32.

The square root of 28372532 is about 5326.5872751697. The cubic root of 28372532 is about 304.9996667559. Note that the first 3 decimals are identical.

The spelling of 28372532 in words is "twenty-eight million, three hundred seventy-two thousand, five hundred thirty-two".