7704072 has 56 divisors (see below), whose sum is σ = 21674190. Its totient is φ = 2566080.

The previous prime is 7704071. The next prime is 7704083. The reversal of 7704072 is 2704077.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4901796 + 2802276 = 2214^2 + 1674^2 .

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

It is not an unprimeable number, because it can be changed into a prime (7704071) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 5172 + ... + 6492.

Almost surely, 2^7704072 is an apocalyptic number.

7704072 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7704072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10837095).

7704072 is an abundant number, since it is smaller than the sum of its proper divisors (13970118).

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

7704072 is a wasteful number, since it uses less digits than its factorization.

7704072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345 (or 1326 counting only the distinct ones).

The product of its (nonzero) digits is 2744, while the sum is 27.

The square root of 7704072 is about 2775.6210115936. The cubic root of 7704072 is about 197.5028851792.

The spelling of 7704072 in words is "seven million, seven hundred four thousand, seventy-two".