1980247730 has 16 divisors (see below), whose sum is σ = 3580015320. Its totient is φ = 788639232.

The previous prime is 1980247691. The next prime is 1980247741. The reversal of 1980247730 is 377420891.

It can be written as a sum of positive squares in 4 ways, for example, as 1815356449 + 164891281 = 42607^2 + 12841^2 .

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, 430079 + ... + 434658.

Almost surely, 2^1980247730 is an apocalyptic number.

1980247730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1980247730 is a deficient number, since it is larger than the sum of its proper divisors (1599767590).

1980247730 is a wasteful number, since it uses less digits than its factorization.

1980247730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864973.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 1980247730 is about 44499.9744943747. The cubic root of 1980247730 is about 1255.7596032164.

The spelling of 1980247730 in words is "one billion, nine hundred eighty million, two hundred forty-seven thousand, seven hundred thirty".