1390964980 has 48 divisors (see below), whose sum is σ = 2971578960. Its totient is φ = 546833408.

The previous prime is 1390964969. The next prime is 1390964983. The reversal of 1390964980 is 894690931.

It can be written as a sum of positive squares in 8 ways, for example, as 170720356 + 1220244624 = 13066^2 + 34932^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390964983) 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, 305682 + ... + 310198.

It is an arithmetic number, because the mean of its divisors is an integer number (61907895).

Almost surely, 2^1390964980 is an apocalyptic number.

1390964980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390964980 is an abundant number, since it is smaller than the sum of its proper divisors (1580613980).

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

1390964980 is a wasteful number, since it uses less digits than its factorization.

1390964980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4788 (or 4786 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 1390964980 is about 37295.6429090584. The cubic root of 1390964980 is about 1116.2772282244.

The spelling of 1390964980 in words is "one billion, three hundred ninety million, nine hundred sixty-four thousand, nine hundred eighty".