401708394 has 12 divisors (see below), whose sum is σ = 870368226. Its totient is φ = 133902792.

The previous prime is 401708387. The next prime is 401708407. The reversal of 401708394 is 493807104.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 209525625 + 192182769 = 14475^2 + 13863^2 .

It is a super-2 number, since 2×401708394² = 322739267620118472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11158549 + ... + 11158584.

Almost surely, 2^401708394 is an apocalyptic number.

401708394 is an abundant number, since it is smaller than the sum of its proper divisors (468659832).

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

401708394 is a wasteful number, since it uses less digits than its factorization.

401708394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22317141 (or 22317138 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 401708394 is about 20042.6643438441. The cubic root of 401708394 is about 737.8537727779.

The spelling of 401708394 in words is "four hundred one million, seven hundred eight thousand, three hundred ninety-four".