398687092 has 12 divisors (see below), whose sum is σ = 698765760. Its totient is φ = 199039736.

The previous prime is 398687087. The next prime is 398687101. The reversal of 398687092 is 290786893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72988 + ... + 78259.

It is an arithmetic number, because the mean of its divisors is an integer number (58230480).

Almost surely, 2^398687092 is an apocalyptic number.

It is an amenable number.

398687092 is a deficient number, since it is larger than the sum of its proper divisors (300078668).

398687092 is a wasteful number, since it uses less digits than its factorization.

398687092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151910 (or 151908 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The square root of 398687092 is about 19967.1503224671. The cubic root of 398687092 is about 735.9992837304. Note that the first 3 decimals are identical.

The spelling of 398687092 in words is "three hundred ninety-eight million, six hundred eighty-seven thousand, ninety-two".