275621772 has 12 divisors (see below), whose sum is σ = 643117496. Its totient is φ = 91873920.

The previous prime is 275621767. The next prime is 275621777. The reversal of 275621772 is 277126572.

It is an interprime number because it is at equal distance from previous prime (275621767) and next prime (275621777).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×275621772² = 151934722400839968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 275621772.

It is not an unprimeable number, because it can be changed into a prime (275621777) 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, 11484229 + ... + 11484252.

Almost surely, 2^275621772 is an apocalyptic number.

It is an amenable number.

275621772 is an abundant number, since it is smaller than the sum of its proper divisors (367495724).

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

275621772 is a wasteful number, since it uses less digits than its factorization.

275621772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22968488 (or 22968486 counting only the distinct ones).

The product of its digits is 82320, while the sum is 39.

The square root of 275621772 is about 16601.8604981490. The cubic root of 275621772 is about 650.7854583613.

The spelling of 275621772 in words is "two hundred seventy-five million, six hundred twenty-one thousand, seven hundred seventy-two".