401542380 has 288 divisors, whose sum is σ = 1386362880. Its totient is φ = 96353280.

The previous prime is 401542373. The next prime is 401542423. The reversal of 401542380 is 83245104.

401542380 is a `hidden beast` number, since 40 + 1 + 542 + 3 + 80 = 666.

It is a super-2 number, since 2×401542380² = 322472565872128800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4837819 + ... + 4837901.

It is an arithmetic number, because the mean of its divisors is an integer number (4813760).

Almost surely, 2^401542380 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 401542380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (693181440).

401542380 is an abundant number, since it is smaller than the sum of its proper divisors (984820500).

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

401542380 is a wasteful number, since it uses less digits than its factorization.

401542380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 401542380 is about 20038.5224006163. The cubic root of 401542380 is about 737.7521145134.

Adding to 401542380 its reverse (83245104), we get a palindrome (484787484).

The spelling of 401542380 in words is "four hundred one million, five hundred forty-two thousand, three hundred eighty".