398931455 has 16 divisors (see below), whose sum is σ = 516184704. Its totient is φ = 294228480.

The previous prime is 398931443. The next prime is 398931479. The reversal of 398931455 is 554139893.

It is not a de Polignac number, because 398931455 - 2⁴ = 398931439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55847 + ... + 62583.

It is an arithmetic number, because the mean of its divisors is an integer number (32261544).

Almost surely, 2^398931455 is an apocalyptic number.

398931455 is a deficient number, since it is larger than the sum of its proper divisors (117253249).

398931455 is a wasteful number, since it uses less digits than its factorization.

398931455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7666.

The product of its digits is 583200, while the sum is 47.

The square root of 398931455 is about 19973.2685106870. The cubic root of 398931455 is about 736.1496223998.

The spelling of 398931455 in words is "three hundred ninety-eight million, nine hundred thirty-one thousand, four hundred fifty-five".