70085520 has 160 divisors (see below), whose sum is σ = 245341440. Its totient is φ = 18385920.

The previous prime is 70085503. The next prime is 70085527. The reversal of 70085520 is 2558007.

It is a happy number.

It is a super-2 number, since 2×70085520² = 9823960227340800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (70085527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153132 + ... + 153588.

It is an arithmetic number, because the mean of its divisors is an integer number (1533384).

Almost surely, 2^70085520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70085520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122670720).

70085520 is an abundant number, since it is smaller than the sum of its proper divisors (175255920).

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

70085520 is a wasteful number, since it uses less digits than its factorization.

70085520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 70085520 is about 8371.7095028435. The cubic root of 70085520 is about 412.2962961162.

The spelling of 70085520 in words is "seventy million, eighty-five thousand, five hundred twenty".