399961598 has 16 divisors (see below), whose sum is σ = 609230160. Its totient is φ = 196894656.

The previous prime is 399961589. The next prime is 399961603. The reversal of 399961598 is 895169993.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94136 + ... + 98292.

It is an arithmetic number, because the mean of its divisors is an integer number (38076885).

Almost surely, 2^399961598 is an apocalyptic number.

399961598 is a deficient number, since it is larger than the sum of its proper divisors (209268562).

399961598 is a wasteful number, since it uses less digits than its factorization.

399961598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4891.

The product of its digits is 4723920, while the sum is 59.

The square root of 399961598 is about 19999.0399269565. The cubic root of 399961598 is about 736.7827199439.

The spelling of 399961598 in words is "three hundred ninety-nine million, nine hundred sixty-one thousand, five hundred ninety-eight".