401560380 has 144 divisors (see below), whose sum is σ = 1330789824. Its totient is φ = 97413120.

The previous prime is 401560373. The next prime is 401560399. The reversal of 401560380 is 83065104.

401560380 is a `hidden beast` number, since 40 + 15 + 603 + 8 + 0 = 666.

It is a super-2 number, since 2×401560380² = 322501477571488800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 164932 + ... + 167348.

It is an arithmetic number, because the mean of its divisors is an integer number (9241596).

Almost surely, 2^401560380 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 401560380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665394912).

401560380 is an abundant number, since it is smaller than the sum of its proper divisors (929229444).

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

401560380 is a wasteful number, since it uses less digits than its factorization.

401560380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516 (or 2511 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 401560380 is about 20038.9715304953. The cubic root of 401560380 is about 737.7631381233.

The spelling of 401560380 in words is "four hundred one million, five hundred sixty thousand, three hundred eighty".