21160328 has 32 divisors (see below), whose sum is σ = 45508800. Its totient is φ = 9035712.

The previous prime is 21160313. The next prime is 21160331. The reversal of 21160328 is 82306112.

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, 20726 + ... + 21722.

It is an arithmetic number, because the mean of its divisors is an integer number (1422150).

Almost surely, 2^21160328 is an apocalyptic number.

21160328 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21160328 is an abundant number, since it is smaller than the sum of its proper divisors (24348472).

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

21160328 is a wasteful number, since it uses less digits than its factorization.

21160328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389 (or 1385 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 21160328 is about 4600.0356520358. The cubic root of 21160328 is about 276.5927539206.

The spelling of 21160328 in words is "twenty-one million, one hundred sixty thousand, three hundred twenty-eight".