1631288406 has 32 divisors (see below), whose sum is σ = 3563359488. Its totient is φ = 493748640.

The previous prime is 1631288327. The next prime is 1631288423. The reversal of 1631288406 is 6048821361.

It is a super-2 number, since 2×1631288406² = 5322203727100041672, which contains 22 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 43791 + ... + 71973.

It is an arithmetic number, because the mean of its divisors is an integer number (111354984).

Almost surely, 2^1631288406 is an apocalyptic number.

1631288406 is an abundant number, since it is smaller than the sum of its proper divisors (1932071082).

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

1631288406 is a wasteful number, since it uses less digits than its factorization.

1631288406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29076.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 1631288406 is about 40389.2115050542. The cubic root of 1631288406 is about 1177.1819197549.

The spelling of 1631288406 in words is "one billion, six hundred thirty-one million, two hundred eighty-eight thousand, four hundred six".