275815428 has 24 divisors (see below), whose sum is σ = 735508032. Its totient is φ = 78804384.

The previous prime is 275815409. The next prime is 275815469. The reversal of 275815428 is 824518572.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 275815428.

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, 1641675 + ... + 1641842.

It is an arithmetic number, because the mean of its divisors is an integer number (30646168).

Almost surely, 2^275815428 is an apocalyptic number.

275815428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

275815428 is an abundant number, since it is smaller than the sum of its proper divisors (459692604).

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

275815428 is a wasteful number, since it uses less digits than its factorization.

275815428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283531 (or 3283529 counting only the distinct ones).

The product of its digits is 179200, while the sum is 42.

The square root of 275815428 is about 16607.6918324010. The cubic root of 275815428 is about 650.9378398935.

The spelling of 275815428 in words is "two hundred seventy-five million, eight hundred fifteen thousand, four hundred twenty-eight".