7277664 has 72 divisors (see below), whose sum is σ = 20035512. Its totient is φ = 2311680.

The previous prime is 7277663. The next prime is 7277681. The reversal of 7277664 is 4667727.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7277663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169227 + ... + 169269.

It is an arithmetic number, because the mean of its divisors is an integer number (278271).

Almost surely, 2^7277664 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 7277664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10017756).

7277664 is an abundant number, since it is smaller than the sum of its proper divisors (12757848).

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

7277664 is a wasteful number, since it uses less digits than its factorization.

7277664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 89 counting only the distinct ones).

The product of its digits is 98784, while the sum is 39.

The square root of 7277664 is about 2697.7145883136. The cubic root of 7277664 is about 193.7896895451.

The spelling of 7277664 in words is "seven million, two hundred seventy-seven thousand, six hundred sixty-four".