1977960 has 64 divisors (see below), whose sum is σ = 6065280. Its totient is φ = 515840.

The previous prime is 1977953. The next prime is 1977961. The reversal of 1977960 is 697791.

It is not an unprimeable number, because it can be changed into a prime (1977961) 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 15 ways as a sum of consecutive naturals, for example, 6205 + ... + 6515.

It is an arithmetic number, because the mean of its divisors is an integer number (94770).

2^1977960 is an apocalyptic number.

1977960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1977960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3032640).

1977960 is an abundant number, since it is smaller than the sum of its proper divisors (4087320).

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

1977960 is a wasteful number, since it uses less digits than its factorization.

1977960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 1977960 is about 1406.3996587030. The cubic root of 1977960 is about 125.5275834462.

The spelling of 1977960 in words is "one million, nine hundred seventy-seven thousand, nine hundred sixty".