7775920 has 60 divisors (see below), whose sum is σ = 18842544. Its totient is φ = 2983680.

The previous prime is 7775903. The next prime is 7775969. The reversal of 7775920 is 295777.

7775920 = T₅ + T₆ + ... + T₃₅₉.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 7775920.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109485 + ... + 109555.

Almost surely, 2^7775920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7775920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9421272).

7775920 is an abundant number, since it is smaller than the sum of its proper divisors (11066624).

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

7775920 is a wasteful number, since it uses less digits than its factorization.

7775920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 30870, while the sum is 37.

The square root of 7775920 is about 2788.5336648497. The cubic root of 7775920 is about 198.1149555224.

The spelling of 7775920 in words is "seven million, seven hundred seventy-five thousand, nine hundred twenty".