1385179980 has 48 divisors (see below), whose sum is σ = 3922097760. Its totient is φ = 365229568.

The previous prime is 1385179979. The next prime is 1385179981. The reversal of 1385179980 is 899715831.

It is an interprime number because it is at equal distance from previous prime (1385179979) and next prime (1385179981).

It is a super-3 number, since 3×1385179980³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1385179981) 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, 124359 + ... + 135038.

It is an arithmetic number, because the mean of its divisors is an integer number (81710370).

Almost surely, 2^1385179980 is an apocalyptic number.

1385179980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1385179980 is an abundant number, since it is smaller than the sum of its proper divisors (2536917780).

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

1385179980 is a wasteful number, since it uses less digits than its factorization.

1385179980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259498 (or 259496 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 51.

The square root of 1385179980 is about 37218.0061260675. The cubic root of 1385179980 is about 1114.7275517914.

The spelling of 1385179980 in words is "one billion, three hundred eighty-five million, one hundred seventy-nine thousand, nine hundred eighty".