252405784 has 8 divisors (see below), whose sum is σ = 473260860. Its totient is φ = 126202888.

The previous prime is 252405779. The next prime is 252405793. The reversal of 252405784 is 487504252.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15775354 + ... + 15775369.

Almost surely, 2^252405784 is an apocalyptic number.

It is an amenable number.

252405784 is a deficient number, since it is larger than the sum of its proper divisors (220855076).

252405784 is a wasteful number, since it uses less digits than its factorization.

252405784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31550729 (or 31550725 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 37.

The square root of 252405784 is about 15887.2837200070. The cubic root of 252405784 is about 631.9748093896.

The spelling of 252405784 in words is "two hundred fifty-two million, four hundred five thousand, seven hundred eighty-four".