401431630 has 16 divisors (see below), whose sum is σ = 747493920. Its totient is φ = 155035552.

The previous prime is 401431621. The next prime is 401431661. The reversal of 401431630 is 36134104.

It is a super-2 number, since 2×401431630² = 322294707128913800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 691834 + ... + 692413.

It is an arithmetic number, because the mean of its divisors is an integer number (46718370).

Almost surely, 2^401431630 is an apocalyptic number.

401431630 is a deficient number, since it is larger than the sum of its proper divisors (346062290).

401431630 is a wasteful number, since it uses less digits than its factorization.

401431630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384283.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 401431630 is about 20035.7587827364. The cubic root of 401431630 is about 737.6842814413.

Adding to 401431630 its reverse (36134104), we get a palindrome (437565734).

The spelling of 401431630 in words is "four hundred one million, four hundred thirty-one thousand, six hundred thirty".