70390890 has 64 divisors (see below), whose sum is σ = 191289600. Its totient is φ = 18412992.

The previous prime is 70390861. The next prime is 70390927. The reversal of 70390890 is 9809307.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11851 + ... + 16769.

It is an arithmetic number, because the mean of its divisors is an integer number (2988900).

Almost surely, 2^70390890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70390890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95644800).

70390890 is an abundant number, since it is smaller than the sum of its proper divisors (120898710).

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

70390890 is a wasteful number, since it uses less digits than its factorization.

70390890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4988 (or 4982 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 70390890 is about 8389.9278900358. The cubic root of 70390890 is about 412.8942346721.

The spelling of 70390890 in words is "seventy million, three hundred ninety thousand, eight hundred ninety".