398288464 has 30 divisors (see below), whose sum is σ = 897674874. Its totient is φ = 170694720.

The previous prime is 398288441. The next prime is 398288477. The reversal of 398288464 is 464882893.

It can be written as a sum of positive squares in only one way, i.e., 396328464 + 1960000 = 19908^2 + 1400^2 .

It is a super-3 number, since 3×398288464³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 253227 + ... + 254794.

Almost surely, 2^398288464 is an apocalyptic number.

It is an amenable number.

398288464 is an abundant number, since it is smaller than the sum of its proper divisors (499386410).

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

398288464 is a wasteful number, since it uses less digits than its factorization.

398288464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508043 (or 508030 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 52.

The square root of 398288464 is about 19957.1657306342. The cubic root of 398288464 is about 735.7539051993.

The spelling of 398288464 in words is "three hundred ninety-eight million, two hundred eighty-eight thousand, four hundred sixty-four".