70518820 has 12 divisors (see below), whose sum is σ = 148089564. Its totient is φ = 28207520.

The previous prime is 70518817. The next prime is 70518827. The reversal of 70518820 is 2881507.

It can be written as a sum of positive squares in 2 ways, for example, as 15492096 + 55026724 = 3936^2 + 7418^2 .

It is not an unprimeable number, because it can be changed into a prime (70518827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1762951 + ... + 1762990.

It is an arithmetic number, because the mean of its divisors is an integer number (12340797).

Almost surely, 2^70518820 is an apocalyptic number.

It is an amenable number.

70518820 is an abundant number, since it is smaller than the sum of its proper divisors (77570744).

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

70518820 is a wasteful number, since it uses less digits than its factorization.

70518820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3525950 (or 3525948 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 70518820 is about 8397.5484517804. The cubic root of 70518820 is about 413.1442177405.

The spelling of 70518820 in words is "seventy million, five hundred eighteen thousand, eight hundred twenty".