7870008890 has 8 divisors (see below), whose sum is σ = 14166016020. Its totient is φ = 3148003552.

The previous prime is 7870008871. The next prime is 7870008899. The reversal of 7870008890 is 988000787.

It can be written as a sum of positive squares in 2 ways, for example, as 7195619929 + 674388961 = 84827^2 + 25969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (7870008899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393500435 + ... + 393500454.

Almost surely, 2^7870008890 is an apocalyptic number.

7870008890 is a deficient number, since it is larger than the sum of its proper divisors (6296007130).

7870008890 is a wasteful number, since it uses less digits than its factorization.

7870008890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787000896.

The product of its (nonzero) digits is 225792, while the sum is 47.

The square root of 7870008890 is about 88713.0705702378. The cubic root of 7870008890 is about 1989.1081995168.

The spelling of 7870008890 in words is "seven billion, eight hundred seventy million, eight thousand, eight hundred ninety".