7776420 has 24 divisors (see below), whose sum is σ = 21774144. Its totient is φ = 2073696.

The previous prime is 7776413. The next prime is 7776427. The reversal of 7776420 is 246777.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7776413) and next prime (7776427).

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (7776427) 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 7 ways as a sum of consecutive naturals, for example, 64744 + ... + 64863.

It is an arithmetic number, because the mean of its divisors is an integer number (907256).

Almost surely, 2^7776420 is an apocalyptic number.

It is an amenable number.

7776420 is an abundant number, since it is smaller than the sum of its proper divisors (13997724).

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

7776420 is a wasteful number, since it uses less digits than its factorization.

7776420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129619 (or 129617 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 33.

The square root of 7776420 is about 2788.6233162620. The cubic root of 7776420 is about 198.1192017662.

The spelling of 7776420 in words is "seven million, seven hundred seventy-six thousand, four hundred twenty".