28349636 has 24 divisors (see below), whose sum is σ = 57859200. Its totient is φ = 12149256.

The previous prime is 28349611. The next prime is 28349663. The reversal of 28349636 is 63694382.

It is a super-2 number, since 2×28349636² = 1607403722664992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28349593 and 28349602.

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, 8960 + ... + 11703.

It is an arithmetic number, because the mean of its divisors is an integer number (2410800).

Almost surely, 2^28349636 is an apocalyptic number.

It is an amenable number.

28349636 is an abundant number, since it is smaller than the sum of its proper divisors (29509564).

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

28349636 is a wasteful number, since it uses less digits than its factorization.

28349636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20688 (or 20672 counting only the distinct ones).

The product of its digits is 186624, while the sum is 41.

The square root of 28349636 is about 5324.4376228856. The cubic root of 28349636 is about 304.9176020361.

The spelling of 28349636 in words is "twenty-eight million, three hundred forty-nine thousand, six hundred thirty-six".