398864115 has 128 divisors (see below), whose sum is σ = 838252800. Its totient is φ = 178053120.

The previous prime is 398864111. The next prime is 398864119. The reversal of 398864115 is 511468893.

It is an interprime number because it is at equal distance from previous prime (398864111) and next prime (398864119).

It is not a de Polignac number, because 398864115 - 2² = 398864111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (398864111) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 864985 + ... + 865445.

It is an arithmetic number, because the mean of its divisors is an integer number (6548850).

Almost surely, 2^398864115 is an apocalyptic number.

398864115 is an abundant number, since it is smaller than the sum of its proper divisors (439388685).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398864115 is a wasteful number, since it uses less digits than its factorization.

398864115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 528 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 398864115 is about 19971.5826864072. The cubic root of 398864115 is about 736.1081991557.

The spelling of 398864115 in words is "three hundred ninety-eight million, eight hundred sixty-four thousand, one hundred fifteen".