401646590 has 32 divisors (see below), whose sum is σ = 768424320. Its totient is φ = 150628864.

The previous prime is 401646569. The next prime is 401646611. The reversal of 401646590 is 95646104.

It is an interprime number because it is at equal distance from previous prime (401646569) and next prime (401646611).

It is a super-2 number, since 2×401646590² = 322639966517256200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401646590.

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 15 ways as a sum of consecutive naturals, for example, 41339 + ... + 50121.

It is an arithmetic number, because the mean of its divisors is an integer number (24013260).

Almost surely, 2^401646590 is an apocalyptic number.

401646590 is a deficient number, since it is larger than the sum of its proper divisors (366777730).

401646590 is a wasteful number, since it uses less digits than its factorization.

401646590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9076.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 401646590 is about 20041.1224735542. The cubic root of 401646590 is about 737.8159305237.

The spelling of 401646590 in words is "four hundred one million, six hundred forty-six thousand, five hundred ninety".