401394442 has 8 divisors (see below), whose sum is σ = 610339716. Its totient is φ = 197947872.

The previous prime is 401394421. The next prime is 401394443. The reversal of 401394442 is 244493104.

It can be written as a sum of positive squares in 2 ways, for example, as 395970201 + 5424241 = 19899^2 + 2329^2 .

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

It is a super-2 number, since 2×401394442² = 322234996136982728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401394443) 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, 1374493 + ... + 1374784.

Almost surely, 2^401394442 is an apocalyptic number.

401394442 is a deficient number, since it is larger than the sum of its proper divisors (208945274).

401394442 is a wasteful number, since it uses less digits than its factorization.

401394442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749352.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 401394442 is about 20034.8307205227. The cubic root of 401394442 is about 737.6615014308.

The spelling of 401394442 in words is "four hundred one million, three hundred ninety-four thousand, four hundred forty-two".