7780050 has 120 divisors (see below), whose sum is σ = 23091156. Its totient is φ = 1935360.

The previous prime is 7780043. The next prime is 7780061. The reversal of 7780050 is 500877.

It can be written as a sum of positive squares in 6 ways, for example, as 1565001 + 6215049 = 1251^2 + 2493^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7779996 and 7780023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 68794 + ... + 68906.

Almost surely, 2^7780050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7780050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11545578).

7780050 is an abundant number, since it is smaller than the sum of its proper divisors (15311106).

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

7780050 is a wasteful number, since it uses less digits than its factorization.

7780050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 7780050 is about 2789.2740991161. The cubic root of 7780050 is about 198.1500240395.

The spelling of 7780050 in words is "seven million, seven hundred eighty thousand, fifty".