1980472680 has 80 divisors (see below), whose sum is σ = 6656599620. Its totient is φ = 528125184.

The previous prime is 1980472667. The next prime is 1980472721. The reversal of 1980472680 is 862740891.

It can be written as a sum of positive squares in 2 ways, for example, as 1833723684 + 146748996 = 42822^2 + 12114^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 302389 + ... + 308868.

Almost surely, 2^1980472680 is an apocalyptic number.

1980472680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1980472680 is an abundant number, since it is smaller than the sum of its proper divisors (4676126940).

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

1980472680 is a wasteful number, since it uses less digits than its factorization.

1980472680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611280 (or 611267 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 1980472680 is about 44502.5019521375. The cubic root of 1980472680 is about 1255.8071515480.

The spelling of 1980472680 in words is "one billion, nine hundred eighty million, four hundred seventy-two thousand, six hundred eighty".