405252616 has 8 divisors (see below), whose sum is σ = 759848670. Its totient is φ = 202626304.

The previous prime is 405252581. The next prime is 405252629. The reversal of 405252616 is 616252504.

It can be written as a sum of positive squares in only one way, i.e., 310112100 + 95140516 = 17610^2 + 9754^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25328281 + ... + 25328296.

Almost surely, 2^405252616 is an apocalyptic number.

It is an amenable number.

405252616 is a deficient number, since it is larger than the sum of its proper divisors (354596054).

405252616 is a wasteful number, since it uses less digits than its factorization.

405252616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50656583 (or 50656579 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 405252616 is about 20130.8871140842. The cubic root of 405252616 is about 740.0174186306.

The spelling of 405252616 in words is "four hundred five million, two hundred fifty-two thousand, six hundred sixteen".