70785090 has 80 divisors (see below), whose sum is σ = 196542720. Its totient is φ = 18260640.

The previous prime is 70785079. The next prime is 70785109. The reversal of 70785090 is 9058707.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 23701 + ... + 26519.

It is an arithmetic number, because the mean of its divisors is an integer number (2456784).

Almost surely, 2^70785090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70785090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98271360).

70785090 is an abundant number, since it is smaller than the sum of its proper divisors (125757630).

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

70785090 is a wasteful number, since it uses less digits than its factorization.

70785090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2869 (or 2860 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The square root of 70785090 is about 8413.3875460483. The cubic root of 70785090 is about 413.6635577881.

The spelling of 70785090 in words is "seventy million, seven hundred eighty-five thousand, ninety".