7721230 has 32 divisors (see below), whose sum is σ = 16057440. Its totient is φ = 2641920.

The previous prime is 7721191. The next prime is 7721249. The reversal of 7721230 is 321277.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195 + ... + 3934.

It is an arithmetic number, because the mean of its divisors is an integer number (501795).

Almost surely, 2^7721230 is an apocalyptic number.

7721230 is an abundant number, since it is smaller than the sum of its proper divisors (8336210).

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

7721230 is a wasteful number, since it uses less digits than its factorization.

7721230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4164.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 7721230 is about 2778.7101324176. The cubic root of 7721230 is about 197.6493982559.

It can be divided in two parts, 772 and 1230, that added together give a palindrome (2002).

The spelling of 7721230 in words is "seven million, seven hundred twenty-one thousand, two hundred thirty".