1397698980 has 24 divisors (see below), whose sum is σ = 3913557312. Its totient is φ = 372719712.

The previous prime is 1397698963. The next prime is 1397699011. The reversal of 1397698980 is 898967931.

It is a Harshad number since it is a multiple of its sum of digits (60), and also a Moran number because the ratio is a prime number: 23294983 = 1397698980 / (1 + 3 + 9 + 7 + 6 + 9 + 8 + 9 + 8 + 0).

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, 11647432 + ... + 11647551.

It is an arithmetic number, because the mean of its divisors is an integer number (163064888).

Almost surely, 2^1397698980 is an apocalyptic number.

1397698980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1397698980 is an abundant number, since it is smaller than the sum of its proper divisors (2515858332).

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

1397698980 is a wasteful number, since it uses less digits than its factorization.

1397698980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23294995 (or 23294993 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 60.

The square root of 1397698980 is about 37385.8125496825. The cubic root of 1397698980 is about 1118.0757189423.

The spelling of 1397698980 in words is "one billion, three hundred ninety-seven million, six hundred ninety-eight thousand, nine hundred eighty".