401394432 has 72 divisors (see below), whose sum is σ = 1072200640. Its totient is φ = 133309440.

The previous prime is 401394421. The next prime is 401394443. The reversal of 401394432 is 234493104.

It is an interprime number because it is at equal distance from previous prime (401394421) and next prime (401394443).

It is a super-2 number, since 2×401394432² = 322234980081205248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401394432.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253419 + ... + 254997.

Almost surely, 2^401394432 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 401394432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536100320).

401394432 is an abundant number, since it is smaller than the sum of its proper divisors (670806208).

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

401394432 is a wasteful number, since it uses less digits than its factorization.

401394432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929 (or 1915 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 401394432 is about 20034.8304709573. The cubic root of 401394432 is about 737.6614953050.

The spelling of 401394432 in words is "four hundred one million, three hundred ninety-four thousand, four hundred thirty-two".