7620385 has 4 divisors (see below), whose sum is σ = 9144468. Its totient is φ = 6096304.

The previous prime is 7620373. The next prime is 7620391. The reversal of 7620385 is 5830267.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5830267 = 461 ⋅12647.

It can be written as a sum of positive squares in 2 ways, for example, as 1817104 + 5803281 = 1348^2 + 2409^2 .

It is a cyclic number.

It is not a de Polignac number, because 7620385 - 2¹³ = 7612193 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 762034 + ... + 762043.

It is an arithmetic number, because the mean of its divisors is an integer number (2286117).

Almost surely, 2^7620385 is an apocalyptic number.

It is an amenable number.

7620385 is a deficient number, since it is larger than the sum of its proper divisors (1524083).

7620385 is a wasteful number, since it uses less digits than its factorization.

7620385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1524082.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 7620385 is about 2760.5044828799. The cubic root of 7620385 is about 196.7851419947.

The spelling of 7620385 in words is "seven million, six hundred twenty thousand, three hundred eighty-five".