1387658980 has 12 divisors (see below), whose sum is σ = 2914083900. Its totient is φ = 555063584.

The previous prime is 1387658953. The next prime is 1387659001. The reversal of 1387658980 is 898567831.

It can be written as a sum of positive squares in 2 ways, for example, as 382515364 + 1005143616 = 19558^2 + 31704^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34691455 + ... + 34691494.

It is an arithmetic number, because the mean of its divisors is an integer number (242840325).

Almost surely, 2^1387658980 is an apocalyptic number.

1387658980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1387658980 is an abundant number, since it is smaller than the sum of its proper divisors (1526424920).

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

1387658980 is a wasteful number, since it uses less digits than its factorization.

1387658980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69382958 (or 69382956 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 55.

The square root of 1387658980 is about 37251.2950110463. The cubic root of 1387658980 is about 1115.3921495951.

The spelling of 1387658980 in words is "one billion, three hundred eighty-seven million, six hundred fifty-eight thousand, nine hundred eighty".