7229664 has 72 divisors (see below), whose sum is σ = 22152312. Its totient is φ = 2223360.

The previous prime is 7229639. The next prime is 7229687. The reversal of 7229664 is 4669227.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 7⁷ + 2⁷ + 2¹⁹ + 9 + 6⁵ + 6⁸ + 4¹¹ .

It is a congruent number.

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, 2779 + ... + 4709.

It is an arithmetic number, because the mean of its divisors is an integer number (307671).

Almost surely, 2^7229664 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 7229664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11076156).

7229664 is an abundant number, since it is smaller than the sum of its proper divisors (14922648).

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

7229664 is a wasteful number, since it uses less digits than its factorization.

7229664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1960 (or 1949 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 7229664 is about 2688.8034513515. The cubic root of 7229664 is about 193.3627013122.

The spelling of 7229664 in words is "seven million, two hundred twenty-nine thousand, six hundred sixty-four".