401992500 has 480 divisors, whose sum is σ = 1567498240. Its totient is φ = 77760000.

The previous prime is 401992499. The next prime is 401992529. The reversal of 401992500 is 5299104.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 159 ways as a sum of consecutive naturals, for example, 12967485 + ... + 12967515.

Almost surely, 2^401992500 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 401992500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (783749120).

401992500 is an abundant number, since it is smaller than the sum of its proper divisors (1165505740).

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

401992500 is a wasteful number, since it uses less digits than its factorization.

401992500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 401992500 is about 20049.7506218905. The cubic root of 401992500 is about 738.0276794283.

The spelling of 401992500 in words is "four hundred one million, nine hundred ninety-two thousand, five hundred".