401506490 has 96 divisors (see below), whose sum is σ = 924778944. Its totient is φ = 124104960.

The previous prime is 401506489. The next prime is 401506507. The reversal of 401506490 is 94605104.

It is a super-2 number, since 2×401506490² = 322414923024240200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 878342 + ... + 878798.

It is an arithmetic number, because the mean of its divisors is an integer number (9633114).

Almost surely, 2^401506490 is an apocalyptic number.

401506490 is an abundant number, since it is smaller than the sum of its proper divisors (523272454).

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

401506490 is a wasteful number, since it uses less digits than its factorization.

401506490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 401506490 is about 20037.6268554936. The cubic root of 401506490 is about 737.7301336768.

The spelling of 401506490 in words is "four hundred one million, five hundred six thousand, four hundred ninety".