401879988 has 48 divisors (see below), whose sum is σ = 1043344960. Its totient is φ = 133775712.

The previous prime is 401879987. The next prime is 401879993. The reversal of 401879988 is 889978104.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401879987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92595 + ... + 96837.

Almost surely, 2^401879988 is an apocalyptic number.

It is an amenable number.

401879988 is an abundant number, since it is smaller than the sum of its proper divisors (641464972).

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

401879988 is a wasteful number, since it uses less digits than its factorization.

401879988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133 (or 5125 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 401879988 is about 20046.9446051013. The cubic root of 401879988 is about 737.9588185098.

The spelling of 401879988 in words is "four hundred one million, eight hundred seventy-nine thousand, nine hundred eighty-eight".