7870557990 has 32 divisors (see below), whose sum is σ = 18897813216. Its totient is φ = 2097873920.

The previous prime is 7870557973. The next prime is 7870558009. The reversal of 7870557990 is 997550787.

It is a self number, because there is not a number n which added to its sum of digits gives 7870557990.

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 15 ways as a sum of consecutive naturals, for example, 10480 + ... + 125900.

It is an arithmetic number, because the mean of its divisors is an integer number (590556663).

Almost surely, 2^7870557990 is an apocalyptic number.

7870557990 is an abundant number, since it is smaller than the sum of its proper divisors (11027255226).

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

7870557990 is a wasteful number, since it uses less digits than its factorization.

7870557990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117704.

The product of its (nonzero) digits is 5556600, while the sum is 57.

The square root of 7870557990 is about 88716.1653251537. The cubic root of 7870557990 is about 1989.1544592660.

The spelling of 7870557990 in words is "seven billion, eight hundred seventy million, five hundred fifty-seven thousand, nine hundred ninety".