1390979120 has 40 divisors (see below), whose sum is σ = 3312912960. Its totient is φ = 542819840.

The previous prime is 1390979111. The next prime is 1390979137. The reversal of 1390979120 is 219790931.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208760 + ... + 215319.

It is an arithmetic number, because the mean of its divisors is an integer number (82822824).

Almost surely, 2^1390979120 is an apocalyptic number.

1390979120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1390979120 is an abundant number, since it is smaller than the sum of its proper divisors (1921933840).

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

1390979120 is a wasteful number, since it uses less digits than its factorization.

1390979120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424133 (or 424127 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 1390979120 is about 37295.8324749562. The cubic root of 1390979120 is about 1116.2810107559.

The spelling of 1390979120 in words is "one billion, three hundred ninety million, nine hundred seventy-nine thousand, one hundred twenty".