252667540 has 24 divisors (see below), whose sum is σ = 536076072. Its totient is φ = 100024320.

The previous prime is 252667523. The next prime is 252667579. The reversal of 252667540 is 45766252.

It can be written as a sum of positive squares in 4 ways, for example, as 29224836 + 223442704 = 5406^2 + 14948^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 252667540.

It is a congruent number.

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, 63181 + ... + 67060.

It is an arithmetic number, because the mean of its divisors is an integer number (22336503).

Almost surely, 2^252667540 is an apocalyptic number.

252667540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

252667540 is an abundant number, since it is smaller than the sum of its proper divisors (283408532).

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

252667540 is a wasteful number, since it uses less digits than its factorization.

252667540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130347 (or 130345 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 252667540 is about 15895.5194944991. The cubic root of 252667540 is about 632.1931958898.

The spelling of 252667540 in words is "two hundred fifty-two million, six hundred sixty-seven thousand, five hundred forty".