405720352 has 12 divisors (see below), whose sum is σ = 798762006. Its totient is φ = 202860160.

The previous prime is 405720347. The next prime is 405720361. The reversal of 405720352 is 253027504.

It can be written as a sum of positive squares in only one way, i.e., 365727376 + 39992976 = 19124^2 + 6324^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 405720352.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6339349 + ... + 6339412.

Almost surely, 2^405720352 is an apocalyptic number.

It is an amenable number.

405720352 is a deficient number, since it is larger than the sum of its proper divisors (393041654).

405720352 is a wasteful number, since it uses less digits than its factorization.

405720352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12678771 (or 12678763 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 405720352 is about 20142.5011356584. The cubic root of 405720352 is about 740.3020145362.

Adding to 405720352 its reverse (253027504), we get a palindrome (658747856).

The spelling of 405720352 in words is "four hundred five million, seven hundred twenty thousand, three hundred fifty-two".