70072776 has 80 divisors (see below), whose sum is σ = 207846540. Its totient is φ = 21980160.

The previous prime is 70072771. The next prime is 70072799. The reversal of 70072776 is 67727007.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70056900 + 15876 = 8370^2 + 126^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 70072776.

It is not an unprimeable number, because it can be changed into a prime (70072771) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7836 + ... + 14196.

Almost surely, 2^70072776 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 70072776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103923270).

70072776 is an abundant number, since it is smaller than the sum of its proper divisors (137773764).

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

70072776 is a wasteful number, since it uses less digits than its factorization.

70072776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6396 (or 6383 counting only the distinct ones).

The product of its (nonzero) digits is 28812, while the sum is 36.

The square root of 70072776 is about 8370.9483333730. The cubic root of 70072776 is about 412.2713046367.

The spelling of 70072776 in words is "seventy million, seventy-two thousand, seven hundred seventy-six".