7420390 has 16 divisors (see below), whose sum is σ = 13416480. Its totient is φ = 2954880.

The previous prime is 7420363. The next prime is 7420397. The reversal of 7420390 is 930247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7420397) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 871 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (838530).

Almost surely, 2^7420390 is an apocalyptic number.

7420390 is a deficient number, since it is larger than the sum of its proper divisors (5996090).

7420390 is a wasteful number, since it uses less digits than its factorization.

7420390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 7420390 is about 2724.0392801867. The cubic root of 7420390 is about 195.0483334057.

The spelling of 7420390 in words is "seven million, four hundred twenty thousand, three hundred ninety".