70585890 has 64 divisors (see below), whose sum is σ = 173650176. Its totient is φ = 18358272.

The previous prime is 70585883. The next prime is 70585901. The reversal of 70585890 is 9858507.

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

It is a Curzon number.

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, 365634 + ... + 365826.

It is an arithmetic number, because the mean of its divisors is an integer number (2713284).

Almost surely, 2^70585890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70585890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86825088).

70585890 is an abundant number, since it is smaller than the sum of its proper divisors (103064286).

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

70585890 is a wasteful number, since it uses less digits than its factorization.

70585890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443.

The product of its (nonzero) digits is 100800, while the sum is 42.

The square root of 70585890 is about 8401.5409300913. The cubic root of 70585890 is about 413.2751558481.

The spelling of 70585890 in words is "seventy million, five hundred eighty-five thousand, eight hundred ninety".