1980389925 has 48 divisors (see below), whose sum is σ = 3852074880. Its totient is φ = 994072320.

The previous prime is 1980389923. The next prime is 1980389941. The reversal of 1980389925 is 5299830891.

It is not a de Polignac number, because 1980389925 - 2¹ = 1980389923 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980389923) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74817 + ... + 97766.

It is an arithmetic number, because the mean of its divisors is an integer number (80251560).

Almost surely, 2^1980389925 is an apocalyptic number.

1980389925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1980389925 is a deficient number, since it is larger than the sum of its proper divisors (1871684955).

1980389925 is a wasteful number, since it uses less digits than its factorization.

1980389925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172619 (or 172608 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 54.

The square root of 1980389925 is about 44501.5721632394. The cubic root of 1980389925 is about 1255.7896598032.

The spelling of 1980389925 in words is "one billion, nine hundred eighty million, three hundred eighty-nine thousand, nine hundred twenty-five".