70615220 has 24 divisors (see below), whose sum is σ = 159699624. Its totient is φ = 26073216.

The previous prime is 70615213. The next prime is 70615249. The reversal of 70615220 is 2251607.

It can be written as a sum of positive squares in 4 ways, for example, as 4648336 + 65966884 = 2156^2 + 8122^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135539 + ... + 136058.

It is an arithmetic number, because the mean of its divisors is an integer number (6654151).

Almost surely, 2^70615220 is an apocalyptic number.

It is an amenable number.

70615220 is an abundant number, since it is smaller than the sum of its proper divisors (89084404).

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

70615220 is a wasteful number, since it uses less digits than its factorization.

70615220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271619 (or 271617 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 70615220 is about 8403.2862619335. The cubic root of 70615220 is about 413.3323895805.

Adding to 70615220 its reverse (2251607), we get a palindrome (72866827).

The spelling of 70615220 in words is "seventy million, six hundred fifteen thousand, two hundred twenty".