7730000 has 50 divisors (see below), whose sum is σ = 18739314. Its totient is φ = 3088000.

The previous prime is 7729999. The next prime is 7730033. The reversal of 7730000 is 377.

It can be written as a sum of positive squares in 5 ways, for example, as 5053504 + 2676496 = 2248^2 + 1636^2 .

It is a tau number, because it is divible by the number of its divisors (50).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 9614 + ... + 10386.

Almost surely, 2^7730000 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 7730000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9369657).

7730000 is an abundant number, since it is smaller than the sum of its proper divisors (11009314).

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

7730000 is an equidigital number, since it uses as much as digits as its factorization.

7730000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 147, while the sum is 17.

The square root of 7730000 is about 2780.2877548916. The cubic root of 7730000 is about 197.7242019405.

Adding to 7730000 its reverse (377), we get a palindrome (7730377).

The spelling of 7730000 in words is "seven million, seven hundred thirty thousand".