398364012 has 72 divisors (see below), whose sum is σ = 1043008512. Its totient is φ = 128066400.

The previous prime is 398364007. The next prime is 398364019. The reversal of 398364012 is 210463893.

398364012 is a `hidden beast` number, since 3 + 9 + 8 + 3 + 640 + 1 + 2 = 666.

It is a super-2 number, since 2×398364012² = 317387772113472288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (398364019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 547593 + ... + 548319.

Almost surely, 2^398364012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398364012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521504256).

398364012 is an abundant number, since it is smaller than the sum of its proper divisors (644644500).

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

398364012 is a wasteful number, since it uses less digits than its factorization.

398364012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259 (or 1254 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 398364012 is about 19959.0583946237. The cubic root of 398364012 is about 735.8004219219.

The spelling of 398364012 in words is "three hundred ninety-eight million, three hundred sixty-four thousand, twelve".