28357620 has 48 divisors (see below), whose sum is σ = 82857600. Its totient is φ = 7232896.

The previous prime is 28357607. The next prime is 28357639. The reversal of 28357620 is 2675382.

It is a super-2 number, since 2×28357620² = 1608309224128800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8895 + ... + 11654.

It is an arithmetic number, because the mean of its divisors is an integer number (1726200).

Almost surely, 2^28357620 is an apocalyptic number.

28357620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28357620 is an abundant number, since it is smaller than the sum of its proper divisors (54499980).

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

28357620 is a wasteful number, since it uses less digits than its factorization.

28357620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20584 (or 20582 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 28357620 is about 5325.1873206489. The cubic root of 28357620 is about 304.9462236104.

The spelling of 28357620 in words is "twenty-eight million, three hundred fifty-seven thousand, six hundred twenty".