398011392 has 132 divisors (see below), whose sum is σ = 1210268280. Its totient is φ = 125632512.

The previous prime is 398011391. The next prime is 398011409. The reversal of 398011392 is 293110893.

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 (398011391) 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, 173968 + ... + 176240.

Almost surely, 2^398011392 is an apocalyptic number.

398011392 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398011392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (605134140).

398011392 is an abundant number, since it is smaller than the sum of its proper divisors (812256888).

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

398011392 is a wasteful number, since it uses less digits than its factorization.

398011392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318 (or 2297 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 398011392 is about 19950.2228558981. Note that the first 3 decimals coincide. The cubic root of 398011392 is about 735.5832549344.

The spelling of 398011392 in words is "three hundred ninety-eight million, eleven thousand, three hundred ninety-two".