70087990 has 32 divisors (see below), whose sum is σ = 148083264. Its totient is φ = 23379840.

The previous prime is 70087973. The next prime is 70088003. The reversal of 70087990 is 9978007.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10941 + ... + 16120.

It is an arithmetic number, because the mean of its divisors is an integer number (4627602).

Almost surely, 2^70087990 is an apocalyptic number.

70087990 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

70087990 is an abundant number, since it is smaller than the sum of its proper divisors (77995274).

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

70087990 is a wasteful number, since it uses less digits than its factorization.

70087990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27112.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 70087990 is about 8371.8570221905. The cubic root of 70087990 is about 412.3011395317.

The spelling of 70087990 in words is "seventy million, eighty-seven thousand, nine hundred ninety".