1631776940 has 24 divisors (see below), whose sum is σ = 3442980912. Its totient is φ = 649615680.

The previous prime is 1631776931. The next prime is 1631776961. The reversal of 1631776940 is 496771361.

It is a junction number, because it is equal to n+sod(n) for n = 1631776891 and 1631776900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189119 + ... + 197558.

It is an arithmetic number, because the mean of its divisors is an integer number (143457538).

Almost surely, 2^1631776940 is an apocalyptic number.

1631776940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1631776940 is an abundant number, since it is smaller than the sum of its proper divisors (1811203972).

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

1631776940 is a wasteful number, since it uses less digits than its factorization.

1631776940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386897 (or 386895 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 1631776940 is about 40395.2588802201. The cubic root of 1631776940 is about 1177.2994211503.

The spelling of 1631776940 in words is "one billion, six hundred thirty-one million, seven hundred seventy-six thousand, nine hundred forty".