272161856 has 28 divisors (see below), whose sum is σ = 544865052. Its totient is φ = 134873088.

The previous prime is 272161853. The next prime is 272161919. The reversal of 272161856 is 658161272.

It can be written as a sum of positive squares in 2 ways, for example, as 28302400 + 243859456 = 5320^2 + 15616^2 .

It is a super-2 number, since 2×272161856² = 148144151722729472, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (272161853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11585 + ... + 26048.

Almost surely, 2^272161856 is an apocalyptic number.

It is an amenable number.

272161856 is an abundant number, since it is smaller than the sum of its proper divisors (272703196).

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

272161856 is a wasteful number, since it uses less digits than its factorization.

272161856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37758 (or 37748 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 272161856 is about 16497.3287534679. The cubic root of 272161856 is about 648.0508520779.

The spelling of 272161856 in words is "two hundred seventy-two million, one hundred sixty-one thousand, eight hundred fifty-six".