7420090 has 8 divisors (see below), whose sum is σ = 13356180. Its totient is φ = 2968032.

The previous prime is 7420079. The next prime is 7420097. The reversal of 7420090 is 900247.

It can be written as a sum of positive squares in 2 ways, for example, as 7177041 + 243049 = 2679^2 + 493^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (7420097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370995 + ... + 371014.

Almost surely, 2^7420090 is an apocalyptic number.

7420090 is a deficient number, since it is larger than the sum of its proper divisors (5936090).

7420090 is a wasteful number, since it uses less digits than its factorization.

7420090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742016.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 7420090 is about 2723.9842143449. The cubic root of 7420090 is about 195.0457048247.

It can be divided in two parts, 74 and 20090, that added together give a square (20164 = 142²).

The spelling of 7420090 in words is "seven million, four hundred twenty thousand, ninety".