7420690 has 8 divisors (see below), whose sum is σ = 13357260. Its totient is φ = 2968272.

The previous prime is 7420681. The next prime is 7420691. The reversal of 7420690 is 960247.

It can be written as a sum of positive squares in 2 ways, for example, as 6446521 + 974169 = 2539^2 + 987^2 .

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

It is a super-2 number, since 2×7420690² = 110133280152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7420691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 371025 + ... + 371044.

Almost surely, 2^7420690 is an apocalyptic number.

7420690 is a deficient number, since it is larger than the sum of its proper divisors (5936570).

7420690 is a wasteful number, since it uses less digits than its factorization.

7420690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742076.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 7420690 is about 2724.0943449154. The cubic root of 7420690 is about 195.0509619159.

The spelling of 7420690 in words is "seven million, four hundred twenty thousand, six hundred ninety".