7799440887 has 48 divisors (see below), whose sum is σ = 13574527200. Its totient is φ = 4412620800.

The previous prime is 7799440871. The next prime is 7799440889. The reversal of 7799440887 is 7880449977.

It is a happy number.

It is not a de Polignac number, because 7799440887 - 2⁴ = 7799440871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7799440889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104439 + ... + 162807.

It is an arithmetic number, because the mean of its divisors is an integer number (282802650).

Almost surely, 2^7799440887 is an apocalyptic number.

7799440887 is a deficient number, since it is larger than the sum of its proper divisors (5775086313).

7799440887 is a wasteful number, since it uses less digits than its factorization.

7799440887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58493 (or 58480 counting only the distinct ones).

The product of its (nonzero) digits is 28449792, while the sum is 63.

The square root of 7799440887 is about 88314.4432525054. The cubic root of 7799440887 is about 1983.1450957067.

The spelling of 7799440887 in words is "seven billion, seven hundred ninety-nine million, four hundred forty thousand, eight hundred eighty-seven".