7800394 has 16 divisors (see below), whose sum is σ = 13408128. Its totient is φ = 3334032.

The previous prime is 7800389. The next prime is 7800409. The reversal of 7800394 is 4930087.

It is a happy number.

It is a super-2 number, since 2×7800394² = 121692293110472, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 9067 + ... + 9889.

It is an arithmetic number, because the mean of its divisors is an integer number (838008).

Almost surely, 2^7800394 is an apocalyptic number.

7800394 is a deficient number, since it is larger than the sum of its proper divisors (5607734).

7800394 is a wasteful number, since it uses less digits than its factorization.

7800394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1509.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 7800394 is about 2792.9185451781. The cubic root of 7800394 is about 198.3225874334.

The spelling of 7800394 in words is "seven million, eight hundred thousand, three hundred ninety-four".