1631973948 has 108 divisors (see below), whose sum is σ = 4307007096. Its totient is φ = 480585600.

The previous prime is 1631973929. The next prime is 1631973983. The reversal of 1631973948 is 8493791361.

It is a self number, because there is not a number n which added to its sum of digits gives 1631973948.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1987378 + ... + 1988198.

Almost surely, 2^1631973948 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1631973948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2153503548).

1631973948 is an abundant number, since it is smaller than the sum of its proper divisors (2675033148).

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

1631973948 is a wasteful number, since it uses less digits than its factorization.

1631973948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 874 counting only the distinct ones).

The product of its digits is 979776, while the sum is 51.

The square root of 1631973948 is about 40397.6973106141. The cubic root of 1631973948 is about 1177.3467985553.

It can be divided in two parts, 1631 and 973948, that added together give a palindrome (975579).

The spelling of 1631973948 in words is "one billion, six hundred thirty-one million, nine hundred seventy-three thousand, nine hundred forty-eight".