7720036 has 24 divisors (see below), whose sum is σ = 13854456. Its totient is φ = 3763200.

The previous prime is 7720021. The next prime is 7720039. The reversal of 7720036 is 6300277.

7720036 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5336100 + 2383936 = 2310^2 + 1544^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39090 + ... + 39286.

It is an arithmetic number, because the mean of its divisors is an integer number (577269).

Almost surely, 2^7720036 is an apocalyptic number.

It is an amenable number.

7720036 is a deficient number, since it is larger than the sum of its proper divisors (6134420).

7720036 is a wasteful number, since it uses less digits than its factorization.

7720036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399 (or 397 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 25.

The square root of 7720036 is about 2778.4952762242. The cubic root of 7720036 is about 197.6392096570.

The spelling of 7720036 in words is "seven million, seven hundred twenty thousand, thirty-six".