401831280 has 100 divisors (see below), whose sum is σ = 1395642072. Its totient is φ = 107153280.

The previous prime is 401831267. The next prime is 401831281. The reversal of 401831280 is 82138104.

It is a super-2 number, since 2×401831280² = 322936755172876800, 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 not an unprimeable number, because it can be changed into a prime (401831281) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24526 + ... + 37485.

Almost surely, 2^401831280 is an apocalyptic number.

401831280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401831280 is an abundant number, since it is smaller than the sum of its proper divisors (993810792).

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

401831280 is a wasteful number, since it uses less digits than its factorization.

401831280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62036 (or 62021 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 401831280 is about 20045.7297198181. The cubic root of 401831280 is about 737.9290036799.

Adding to 401831280 its reverse (82138104), we get a palindrome (483969384).

The spelling of 401831280 in words is "four hundred one million, eight hundred thirty-one thousand, two hundred eighty".