401328490 has 8 divisors (see below), whose sum is σ = 722391300. Its totient is φ = 160531392.

The previous prime is 401328481. The next prime is 401328493. The reversal of 401328490 is 94823104.

It can be written as a sum of positive squares in 2 ways, for example, as 397324489 + 4004001 = 19933^2 + 2001^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×401328490² = 322129113771360200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401328493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20066415 + ... + 20066434.

Almost surely, 2^401328490 is an apocalyptic number.

401328490 is a deficient number, since it is larger than the sum of its proper divisors (321062810).

401328490 is a wasteful number, since it uses less digits than its factorization.

401328490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40132856.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 401328490 is about 20033.1847193600. The cubic root of 401328490 is about 737.6210981840.

The spelling of 401328490 in words is "four hundred one million, three hundred twenty-eight thousand, four hundred ninety".