28724652 has 48 divisors (see below), whose sum is σ = 81244800. Its totient is φ = 8704080.

The previous prime is 28724651. The next prime is 28724671. The reversal of 28724652 is 25642782.

It is a super-2 number, since 2×28724652² = 1650211265042208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28724651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10902 + ... + 13277.

It is an arithmetic number, because the mean of its divisors is an integer number (1692600).

Almost surely, 2^28724652 is an apocalyptic number.

28724652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28724652 is an abundant number, since it is smaller than the sum of its proper divisors (52520148).

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

28724652 is a wasteful number, since it uses less digits than its factorization.

28724652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24203 (or 24195 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 28724652 is about 5359.5384129606. The cubic root of 28724652 is about 306.2562252240.

The spelling of 28724652 in words is "twenty-eight million, seven hundred twenty-four thousand, six hundred fifty-two".