401025996 has 144 divisors (see below), whose sum is σ = 1209062400. Its totient is φ = 111978720.

The previous prime is 401025983. The next prime is 401025997. The reversal of 401025996 is 699520104.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 401025996.

It is not an unprimeable number, because it can be changed into a prime (401025997) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 580011 + ... + 580701.

Almost surely, 2^401025996 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 401025996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604531200).

401025996 is an abundant number, since it is smaller than the sum of its proper divisors (808036404).

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

401025996 is a wasteful number, since it uses less digits than its factorization.

401025996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 401025996 is about 20025.6334731264. The cubic root of 401025996 is about 737.4357288049.

The spelling of 401025996 in words is "four hundred one million, twenty-five thousand, nine hundred ninety-six".