7631728 has 20 divisors (see below), whose sum is σ = 15924328. Its totient is φ = 3522240.

The previous prime is 7631693. The next prime is 7631737. The reversal of 7631728 is 8271367.

It is a super-3 number, since 3×7631728³ (a number of 22 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7631693 and 7631702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18138 + ... + 18553.

Almost surely, 2^7631728 is an apocalyptic number.

It is an amenable number.

7631728 is an abundant number, since it is smaller than the sum of its proper divisors (8292600).

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

7631728 is a wasteful number, since it uses less digits than its factorization.

7631728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36712 (or 36706 counting only the distinct ones).

The product of its digits is 14112, while the sum is 34.

The square root of 7631728 is about 2762.5582346803. The cubic root of 7631728 is about 196.8827323074.

The spelling of 7631728 in words is "seven million, six hundred thirty-one thousand, seven hundred twenty-eight".