70716820 has 12 divisors (see below), whose sum is σ = 148505364. Its totient is φ = 28286720.

The previous prime is 70716817. The next prime is 70716827. The reversal of 70716820 is 2861707.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16016004 + 54700816 = 4002^2 + 7396^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70716827) 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, 1767901 + ... + 1767940.

It is an arithmetic number, because the mean of its divisors is an integer number (12375447).

Almost surely, 2^70716820 is an apocalyptic number.

It is an amenable number.

70716820 is an abundant number, since it is smaller than the sum of its proper divisors (77788544).

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

70716820 is a wasteful number, since it uses less digits than its factorization.

70716820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535850 (or 3535848 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 70716820 is about 8409.3293430570. The cubic root of 70716820 is about 413.5305265001.

The spelling of 70716820 in words is "seventy million, seven hundred sixteen thousand, eight hundred twenty".