7920390 has 16 divisors (see below), whose sum is σ = 19009008. Its totient is φ = 2112096.

The previous prime is 7920389. The next prime is 7920401. The reversal of 7920390 is 930297.

7920390 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 264013 = 7920390 / (7 + 9 + 2 + 0 + 3 + 9 + 0).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131977 + ... + 132036.

It is an arithmetic number, because the mean of its divisors is an integer number (1188063).

Almost surely, 2^7920390 is an apocalyptic number.

7920390 is an abundant number, since it is smaller than the sum of its proper divisors (11088618).

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

7920390 is a wasteful number, since it uses less digits than its factorization.

7920390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264023.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 7920390 is about 2814.3187452739. The cubic root of 7920390 is about 199.3343704777.

The spelling of 7920390 in words is "seven million, nine hundred twenty thousand, three hundred ninety".