7878312290 has 16 divisors (see below), whose sum is σ = 14221835712. Its totient is φ = 3142241904.

The previous prime is 7878312287. The next prime is 7878312293. The reversal of 7878312290 is 922138787.

It is an interprime number because it is at equal distance from previous prime (7878312287) and next prime (7878312293).

It is not an unprimeable number, because it can be changed into a prime (7878312293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1131734 + ... + 1138673.

It is an arithmetic number, because the mean of its divisors is an integer number (888864732).

Almost surely, 2^7878312290 is an apocalyptic number.

7878312290 is a deficient number, since it is larger than the sum of its proper divisors (6343523422).

7878312290 is a wasteful number, since it uses less digits than its factorization.

7878312290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270761.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 7878312290 is about 88759.8574244010. The cubic root of 7878312290 is about 1989.8075022337.

The spelling of 7878312290 in words is "seven billion, eight hundred seventy-eight million, three hundred twelve thousand, two hundred ninety".