1977260916 has 96 divisors (see below), whose sum is σ = 5091609600. Its totient is φ = 594881280.

The previous prime is 1977260839. The next prime is 1977260921. The reversal of 1977260916 is 6190627791.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 399505 + ... + 404423.

It is an arithmetic number, because the mean of its divisors is an integer number (53037600).

Almost surely, 2^1977260916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1977260916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2545804800).

1977260916 is an abundant number, since it is smaller than the sum of its proper divisors (3114348684).

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

1977260916 is a wasteful number, since it uses less digits than its factorization.

1977260916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5029 (or 5027 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 48.

The square root of 1977260916 is about 44466.4021031610. The cubic root of 1977260916 is about 1255.1279301132.

The spelling of 1977260916 in words is "one billion, nine hundred seventy-seven million, two hundred sixty thousand, nine hundred sixteen".