401855379 has 24 divisors (see below), whose sum is σ = 562600080. Its totient is φ = 255121152.

The previous prime is 401855371. The next prime is 401855411. The reversal of 401855379 is 973558104.

It is not a de Polignac number, because 401855379 - 2³ = 401855371 is a prime.

It is a super-2 number, since 2×401855379² = 322975491262467282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401855379.

It is not an unprimeable number, because it can be changed into a prime (401855371) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 496327 + ... + 497135.

It is an arithmetic number, because the mean of its divisors is an integer number (23441670).

Almost surely, 2^401855379 is an apocalyptic number.

401855379 is a deficient number, since it is larger than the sum of its proper divisors (160744701).

401855379 is a wasteful number, since it uses less digits than its factorization.

401855379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171 (or 1148 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 401855379 is about 20046.3308113979. The cubic root of 401855379 is about 737.9437553070.

The spelling of 401855379 in words is "four hundred one million, eight hundred fifty-five thousand, three hundred seventy-nine".