70215236 has 72 divisors (see below), whose sum is σ = 163088856. Its totient is φ = 26127360.

The previous prime is 70215193. The next prime is 70215239. The reversal of 70215236 is 63251207.

It can be written as a sum of positive squares in 4 ways, for example, as 15366400 + 54848836 = 3920^2 + 7406^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70215239) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42506 + ... + 44126.

It is an arithmetic number, because the mean of its divisors is an integer number (2265123).

Almost surely, 2^70215236 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 70215236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81544428).

70215236 is an abundant number, since it is smaller than the sum of its proper divisors (92873620).

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

70215236 is a wasteful number, since it uses less digits than its factorization.

70215236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1669 (or 1660 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 70215236 is about 8379.4532041178. The cubic root of 70215236 is about 412.5505020507.

The spelling of 70215236 in words is "seventy million, two hundred fifteen thousand, two hundred thirty-six".