401332538 has 16 divisors (see below), whose sum is σ = 611188200. Its totient is φ = 197611776.

The previous prime is 401332523. The next prime is 401332579. The reversal of 401332538 is 835233104.

It can be written as a sum of positive squares in 4 ways, for example, as 225690529 + 175642009 = 15023^2 + 13253^2 .

It is a super-2 number, since 2×401332538² = 322135612115042888, 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 401332538.

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 7 ways as a sum of consecutive naturals, for example, 114638 + ... + 118086.

Almost surely, 2^401332538 is an apocalyptic number.

401332538 is a deficient number, since it is larger than the sum of its proper divisors (209855662).

401332538 is a wasteful number, since it uses less digits than its factorization.

401332538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4321.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 401332538 is about 20033.2857514687. The cubic root of 401332538 is about 737.6235781808.

The spelling of 401332538 in words is "four hundred one million, three hundred thirty-two thousand, five hundred thirty-eight".