401972986 has 8 divisors (see below), whose sum is σ = 605362464. Its totient is φ = 200185500.

The previous prime is 401972983. The next prime is 401972993. The reversal of 401972986 is 689279104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (401972983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399870 + ... + 400873.

It is an arithmetic number, because the mean of its divisors is an integer number (75670308).

Almost surely, 2^401972986 is an apocalyptic number.

401972986 is a deficient number, since it is larger than the sum of its proper divisors (203389478).

401972986 is a wasteful number, since it uses less digits than its factorization.

401972986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800996.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 401972986 is about 20049.2639765154. The cubic root of 401972986 is about 738.0157371614.

The spelling of 401972986 in words is "four hundred one million, nine hundred seventy-two thousand, nine hundred eighty-six".