707812020 has 90 divisors (see below), whose sum is σ = 2223796806. Its totient is φ = 188464320.

The previous prime is 707812013. The next prime is 707812031. The reversal of 707812020 is 20218707.

It can be written as a sum of positive squares in 3 ways, for example, as 249766416 + 458045604 = 15804^2 + 21402^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1070490 + ... + 1071150.

Almost surely, 2^707812020 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 707812020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1111898403).

707812020 is an abundant number, since it is smaller than the sum of its proper divisors (1515984786).

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

707812020 is an equidigital number, since it uses as much as digits as its factorization.

707812020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 671 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 707812020 is about 26604.7367962925. The cubic root of 707812020 is about 891.1948014705.

The spelling of 707812020 in words is "seven hundred seven million, eight hundred twelve thousand, twenty".