275231628 has 72 divisors (see below), whose sum is σ = 830079600. Its totient is φ = 78636096.

The previous prime is 275231623. The next prime is 275231633. The reversal of 275231628 is 826132572.

275231628 is a `hidden beast` number, since 2 + 7 + 5 + 23 + 1 + 628 = 666.

It is an interprime number because it is at equal distance from previous prime (275231623) and next prime (275231633).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 275231592 and 275231601.

It is not an unprimeable number, because it can be changed into a prime (275231623) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20713 + ... + 31296.

Almost surely, 2^275231628 is an apocalyptic number.

275231628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

275231628 is an abundant number, since it is smaller than the sum of its proper divisors (554847972).

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

275231628 is a wasteful number, since it uses less digits than its factorization.

275231628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52036 (or 52021 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 275231628 is about 16590.1063287732. The cubic root of 275231628 is about 650.4782500044.

The spelling of 275231628 in words is "two hundred seventy-five million, two hundred thirty-one thousand, six hundred twenty-eight".