70212820 has 12 divisors (see below), whose sum is σ = 147446964. Its totient is φ = 28085120.

The previous prime is 70212811. The next prime is 70212827. The reversal of 70212820 is 2821207.

It can be written as a sum of positive squares in 2 ways, for example, as 53056656 + 17156164 = 7284^2 + 4142^2 .

It is a junction number, because it is equal to n+sod(n) for n = 70212791 and 70212800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70212827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1755301 + ... + 1755340.

It is an arithmetic number, because the mean of its divisors is an integer number (12287247).

Almost surely, 2^70212820 is an apocalyptic number.

It is an amenable number.

70212820 is an abundant number, since it is smaller than the sum of its proper divisors (77234144).

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

70212820 is a wasteful number, since it uses less digits than its factorization.

70212820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510650 (or 3510648 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 70212820 is about 8379.3090407264. The cubic root of 70212820 is about 412.5457702503.

The spelling of 70212820 in words is "seventy million, two hundred twelve thousand, eight hundred twenty".