401787912 has 64 divisors (see below), whose sum is σ = 1037681280. Its totient is φ = 129572352.

The previous prime is 401787863. The next prime is 401787923. The reversal of 401787912 is 219787104.

It is a super-2 number, since 2×401787912² = 322867052458639488, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90693 + ... + 95019.

It is an arithmetic number, because the mean of its divisors is an integer number (16213770).

Almost surely, 2^401787912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401787912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518840640).

401787912 is an abundant number, since it is smaller than the sum of its proper divisors (635893368).

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

401787912 is a wasteful number, since it uses less digits than its factorization.

401787912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4462 (or 4458 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 401787912 is about 20044.6479639828. The cubic root of 401787912 is about 737.9024555091.

The spelling of 401787912 in words is "four hundred one million, seven hundred eighty-seven thousand, nine hundred twelve".