399760415 has 8 divisors (see below), whose sum is σ = 480783600. Its totient is φ = 319094272.

The previous prime is 399760409. The next prime is 399760429. The reversal of 399760415 is 514067993.

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

It is a cyclic number.

It is not a de Polignac number, because 399760415 - 2⁶ = 399760351 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86789 + ... + 91278.

It is an arithmetic number, because the mean of its divisors is an integer number (60097950).

Almost surely, 2^399760415 is an apocalyptic number.

399760415 is a deficient number, since it is larger than the sum of its proper divisors (81023185).

399760415 is a wasteful number, since it uses less digits than its factorization.

399760415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178521.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 399760415 is about 19994.0094778411. The cubic root of 399760415 is about 736.6591639001.

The spelling of 399760415 in words is "three hundred ninety-nine million, seven hundred sixty thousand, four hundred fifteen".