7700020 has 12 divisors (see below), whose sum is σ = 16170084. Its totient is φ = 3080000.

The previous prime is 7699981. The next prime is 7700071. The reversal of 7700020 is 200077.

It can be written as a sum of positive squares in 2 ways, for example, as 4112784 + 3587236 = 2028^2 + 1894^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7699967 and 7700003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192481 + ... + 192520.

It is an arithmetic number, because the mean of its divisors is an integer number (1347507).

Almost surely, 2^7700020 is an apocalyptic number.

It is an amenable number.

7700020 is an abundant number, since it is smaller than the sum of its proper divisors (8470064).

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

7700020 is a wasteful number, since it uses less digits than its factorization.

7700020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385010 (or 385008 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 16.

The square root of 7700020 is about 2774.8909888498. The cubic root of 7700020 is about 197.4682531891.

Adding to 7700020 its reverse (200077), we get a palindrome (7900097).

The spelling of 7700020 in words is "seven million, seven hundred thousand, twenty".