1406631656 has 16 divisors (see below), whose sum is σ = 2670820800. Its totient is φ = 694412784.

The previous prime is 1406631619. The next prime is 1406631659. The reversal of 1406631656 is 6561366041.

It is a super-2 number, since 2×1406631656² = 3957225231322604672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1406631659) 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, 1112210 + ... + 1113473.

It is an arithmetic number, because the mean of its divisors is an integer number (166926300).

Almost surely, 2^1406631656 is an apocalyptic number.

It is an amenable number.

1406631656 is a deficient number, since it is larger than the sum of its proper divisors (1264189144).

1406631656 is a wasteful number, since it uses less digits than its factorization.

1406631656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225768 (or 2225764 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 1406631656 is about 37505.0884014423. The cubic root of 1406631656 is about 1120.4525318424.

Adding to 1406631656 its reverse (6561366041), we get a palindrome (7967997697).

The spelling of 1406631656 in words is "one billion, four hundred six million, six hundred thirty-one thousand, six hundred fifty-six".