399845092 has 6 divisors (see below), whose sum is σ = 699728918. Its totient is φ = 199922544.

The previous prime is 399845081. The next prime is 399845111. The reversal of 399845092 is 290548993.

It can be written as a sum of positive squares in only one way, i.e., 369639076 + 30206016 = 19226^2 + 5496^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49980633 + ... + 49980640.

Almost surely, 2^399845092 is an apocalyptic number.

It is an amenable number.

399845092 is a deficient number, since it is larger than the sum of its proper divisors (299883826).

399845092 is a wasteful number, since it uses less digits than its factorization.

399845092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99961277 (or 99961275 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 399845092 is about 19996.1269249822. The cubic root of 399845092 is about 736.7111731219.

The spelling of 399845092 in words is "three hundred ninety-nine million, eight hundred forty-five thousand, ninety-two".