399410561 has 8 divisors (see below), whose sum is σ = 446348448. Its totient is φ = 354244000.

The previous prime is 399410549. The next prime is 399410567. The reversal of 399410561 is 165014993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 399410561 - 2⁶ = 399410497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399410567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 442355 + ... + 443256.

It is an arithmetic number, because the mean of its divisors is an integer number (55793556).

Almost surely, 2^399410561 is an apocalyptic number.

It is an amenable number.

399410561 is a deficient number, since it is larger than the sum of its proper divisors (46937887).

399410561 is a wasteful number, since it uses less digits than its factorization.

399410561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885663.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 399410561 is about 19985.2585922725. The cubic root of 399410561 is about 736.4442031678. Note that the first 3 decimals are identical.

The spelling of 399410561 in words is "three hundred ninety-nine million, four hundred ten thousand, five hundred sixty-one".