1976507648 has 36 divisors (see below), whose sum is σ = 3971849700. Its totient is φ = 981602304.

The previous prime is 1976507629. The next prime is 1976507653. The reversal of 1976507648 is 8467056791.

It can be written as a sum of positive squares in 2 ways, for example, as 454883584 + 1521624064 = 21328^2 + 39008^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1976507648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12236 + ... + 64052.

Almost surely, 2^1976507648 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 1976507648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1985924850).

1976507648 is an abundant number, since it is smaller than the sum of its proper divisors (1995342052).

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

1976507648 is an equidigital number, since it uses as much as digits as its factorization.

1976507648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51982 (or 51968 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 53.

The square root of 1976507648 is about 44457.9312159259. The cubic root of 1976507648 is about 1254.9685230964.

The spelling of 1976507648 in words is "one billion, nine hundred seventy-six million, five hundred seven thousand, six hundred forty-eight".