70388890 has 32 divisors (see below), whose sum is σ = 148853376. Its totient is φ = 23626560.

The previous prime is 70388881. The next prime is 70388917. The reversal of 70388890 is 9888307.

It is a happy 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, 23182 + ... + 26041.

It is an arithmetic number, because the mean of its divisors is an integer number (4651668).

Almost surely, 2^70388890 is an apocalyptic number.

70388890 is an abundant number, since it is smaller than the sum of its proper divisors (78464486).

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

70388890 is a wasteful number, since it uses less digits than its factorization.

70388890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49254.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 70388890 is about 8389.8086986534. The cubic root of 70388890 is about 412.8903241457.

The spelling of 70388890 in words is "seventy million, three hundred eighty-eight thousand, eight hundred ninety".