28240532 has 24 divisors (see below), whose sum is σ = 50207976. Its totient is φ = 13897728.

The previous prime is 28240529. The next prime is 28240543. The reversal of 28240532 is 23504282.

It can be written as a sum of positive squares in 4 ways, for example, as 1936 + 28238596 = 44^2 + 5314^2 .

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, 121088 + ... + 121320.

It is an arithmetic number, because the mean of its divisors is an integer number (2091999).

Almost surely, 2^28240532 is an apocalyptic number.

It is an amenable number.

28240532 is a deficient number, since it is larger than the sum of its proper divisors (21967444).

28240532 is a wasteful number, since it uses less digits than its factorization.

28240532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 28240532 is about 5314.1821572091. The cubic root of 28240532 is about 304.5259391749.

The spelling of 28240532 in words is "twenty-eight million, two hundred forty thousand, five hundred thirty-two".