401979970 has 32 divisors (see below), whose sum is σ = 862887168. Its totient is φ = 131828928.

The previous prime is 401979923. The next prime is 401979973. The reversal of 401979970 is 79979104.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 401979970.

It is not an unprimeable number, because it can be changed into a prime (401979973) 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, 123229 + ... + 126448.

It is an arithmetic number, because the mean of its divisors is an integer number (26965224).

Almost surely, 2^401979970 is an apocalyptic number.

401979970 is an abundant number, since it is smaller than the sum of its proper divisors (460907198).

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

401979970 is a wasteful number, since it uses less digits than its factorization.

401979970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249714.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 401979970 is about 20049.4381467412. The cubic root of 401979970 is about 738.0200113061.

The spelling of 401979970 in words is "four hundred one million, nine hundred seventy-nine thousand, nine hundred seventy".