398931611 has 8 divisors (see below), whose sum is σ = 429972480. Its totient is φ = 367941312.

The previous prime is 398931587. The next prime is 398931661. The reversal of 398931611 is 116139893.

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 398931611 - 2²² = 394737307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398931661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4631 + ... + 28623.

It is an arithmetic number, because the mean of its divisors is an integer number (53746560).

Almost surely, 2^398931611 is an apocalyptic number.

398931611 is a deficient number, since it is larger than the sum of its proper divisors (31040869).

398931611 is a wasteful number, since it uses less digits than its factorization.

398931611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25285.

The product of its digits is 34992, while the sum is 41.

The square root of 398931611 is about 19973.2724159062. The cubic root of 398931611 is about 736.1497183556.

The spelling of 398931611 in words is "three hundred ninety-eight million, nine hundred thirty-one thousand, six hundred eleven".