1980415939 has 8 divisors (see below), whose sum is σ = 2006307072. Its totient is φ = 1954573320.

The previous prime is 1980415891. The next prime is 1980415963. The reversal of 1980415939 is 9395140891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1980415939 - 2²¹ = 1978318787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1980415892 and 1980415901.

It is not an unprimeable number, because it can be changed into a prime (1980415139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74002 + ... + 97144.

It is an arithmetic number, because the mean of its divisors is an integer number (250788384).

Almost surely, 2^1980415939 is an apocalyptic number.

1980415939 is a deficient number, since it is larger than the sum of its proper divisors (25891133).

1980415939 is a wasteful number, since it uses less digits than its factorization.

1980415939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24257.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 1980415939 is about 44501.8644440882. The cubic root of 1980415939 is about 1255.7951583784.

The spelling of 1980415939 in words is "one billion, nine hundred eighty million, four hundred fifteen thousand, nine hundred thirty-nine".