7872764040 has 48 divisors (see below), whose sum is σ = 25586484300. Its totient is φ = 2099403648.

The previous prime is 7872764033. The next prime is 7872764069. The reversal of 7872764040 is 404672787.

It can be written as a sum of positive squares in 2 ways, for example, as 7757029476 + 115734564 = 88074^2 + 10758^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10934035 + ... + 10934754.

Almost surely, 2^7872764040 is an apocalyptic number.

It is an amenable number.

7872764040 is an abundant number, since it is smaller than the sum of its proper divisors (17713720260).

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

7872764040 is a wasteful number, since it uses less digits than its factorization.

7872764040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21868806 (or 21868799 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 45.

The square root of 7872764040 is about 88728.5976447278. The cubic root of 7872764040 is about 1989.3402895580.

The spelling of 7872764040 in words is "seven billion, eight hundred seventy-two million, seven hundred sixty-four thousand, forty".