1363991980 has 48 divisors (see below), whose sum is σ = 3089638944. Its totient is φ = 502824960.

The previous prime is 1363991953. The next prime is 1363991999. The reversal of 1363991980 is 891993631.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173740 + ... + 181420.

It is an arithmetic number, because the mean of its divisors is an integer number (64367478).

Almost surely, 2^1363991980 is an apocalyptic number.

1363991980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1363991980 is an abundant number, since it is smaller than the sum of its proper divisors (1725646964).

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

1363991980 is a wasteful number, since it uses less digits than its factorization.

1363991980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8386 (or 8384 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 49.

The square root of 1363991980 is about 36932.2620482418. The cubic root of 1363991980 is about 1109.0146220891.

The spelling of 1363991980 in words is "one billion, three hundred sixty-three million, nine hundred ninety-one thousand, nine hundred eighty".