401172320 has 48 divisors (see below), whose sum is σ = 956506320. Its totient is φ = 158989824.

The previous prime is 401172319. The next prime is 401172323. The reversal of 401172320 is 23271104.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 401172292 and 401172301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401172323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5939 + ... + 28941.

It is an arithmetic number, because the mean of its divisors is an integer number (19927215).

Almost surely, 2^401172320 is an apocalyptic number.

401172320 is a gapful number since it is divisible by the number (40) 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 401172320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (478253160).

401172320 is an abundant number, since it is smaller than the sum of its proper divisors (555334000).

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

401172320 is a wasteful number, since it uses less digits than its factorization.

401172320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23127 (or 23119 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 401172320 is about 20029.2865574388. The cubic root of 401172320 is about 737.5254082982.

The spelling of 401172320 in words is "four hundred one million, one hundred seventy-two thousand, three hundred twenty".