1957980 has 24 divisors (see below), whose sum is σ = 5482512. Its totient is φ = 522112.

The previous prime is 1957957. The next prime is 1957981. The reversal of 1957980 is 897591.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1957981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16257 + ... + 16376.

It is an arithmetic number, because the mean of its divisors is an integer number (228438).

2^1957980 is an apocalyptic number.

1957980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1957980 is an abundant number, since it is smaller than the sum of its proper divisors (3524532).

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

1957980 is a wasteful number, since it uses less digits than its factorization.

1957980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32645 (or 32643 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 39.

The square root of 1957980 is about 1399.2783854544. The cubic root of 1957980 is about 125.1034876322.

The spelling of 1957980 in words is "one million, nine hundred fifty-seven thousand, nine hundred eighty".