398249015 has 12 divisors (see below), whose sum is σ = 489372312. Its totient is φ = 310961280.

The previous prime is 398249009. The next prime is 398249017. The reversal of 398249015 is 510942893.

It is not a de Polignac number, because 398249015 - 2²⁸ = 129813559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398249017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 291935 + ... + 293295.

It is an arithmetic number, because the mean of its divisors is an integer number (40781026).

Almost surely, 2^398249015 is an apocalyptic number.

398249015 is a deficient number, since it is larger than the sum of its proper divisors (91123297).

398249015 is an frugal number, since it uses more digits than its factorization.

398249015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2770 (or 1409 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 398249015 is about 19956.1773644153. The cubic root of 398249015 is about 735.7296131625.

The spelling of 398249015 in words is "three hundred ninety-eight million, two hundred forty-nine thousand, fifteen".