399913776 has 60 divisors (see below), whose sum is σ = 1120652728. Its totient is φ = 133132032.

The previous prime is 399913771. The next prime is 399913777. The reversal of 399913776 is 677319993.

It is not an unprimeable number, because it can be changed into a prime (399913771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160476 + ... + 162948.

Almost surely, 2^399913776 is an apocalyptic number.

399913776 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

399913776 is an abundant number, since it is smaller than the sum of its proper divisors (720738952).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399913776 is a wasteful number, since it uses less digits than its factorization.

399913776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3610 (or 3601 counting only the distinct ones).

The product of its digits is 1928934, while the sum is 54.

The square root of 399913776 is about 19997.8442838222. The cubic root of 399913776 is about 736.7533539349.

It can be divided in two parts, 399913 and 776, that added together give a square (400689 = 633²).

The spelling of 399913776 in words is "three hundred ninety-nine million, nine hundred thirteen thousand, seven hundred seventy-six".