70207820 has 24 divisors (see below), whose sum is σ = 150867024. Its totient is φ = 27429696.

The previous prime is 70207783. The next prime is 70207829. The reversal of 70207820 is 2870207.

It is a self number, because there is not a number n which added to its sum of digits gives 70207820.

It is not an unprimeable number, because it can be changed into a prime (70207829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39959 + ... + 41678.

It is an arithmetic number, because the mean of its divisors is an integer number (6286126).

Almost surely, 2^70207820 is an apocalyptic number.

It is an amenable number.

70207820 is an abundant number, since it is smaller than the sum of its proper divisors (80659204).

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

70207820 is a wasteful number, since it uses less digits than its factorization.

70207820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81689 (or 81687 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 70207820 is about 8379.0106814588. The cubic root of 70207820 is about 412.5359772722.

The spelling of 70207820 in words is "seventy million, two hundred seven thousand, eight hundred twenty".