1381630992 has 80 divisors (see below), whose sum is σ = 4219789440. Its totient is φ = 381136896.

The previous prime is 1381630981. The next prime is 1381630993. The reversal of 1381630992 is 2990361831.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1381630993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61153 + ... + 80640.

It is an arithmetic number, because the mean of its divisors is an integer number (52747368).

Almost surely, 2^1381630992 is an apocalyptic number.

1381630992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1381630992 is an abundant number, since it is smaller than the sum of its proper divisors (2838158448).

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

1381630992 is a wasteful number, since it uses less digits than its factorization.

1381630992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141840 (or 141834 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1381630992 is about 37170.2971739533. The cubic root of 1381630992 is about 1113.7747181561.

The spelling of 1381630992 in words is "one billion, three hundred eighty-one million, six hundred thirty thousand, nine hundred ninety-two".