7720432 has 10 divisors (see below), whose sum is σ = 14958368. Its totient is φ = 3860208.

The previous prime is 7720429. The next prime is 7720439. The reversal of 7720432 is 2340277.

It is a junction number, because it is equal to n+sod(n) for n = 7720397 and 7720406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 241248 + ... + 241279.

Almost surely, 2^7720432 is an apocalyptic number.

It is an amenable number.

7720432 is a deficient number, since it is larger than the sum of its proper divisors (7237936).

7720432 is a wasteful number, since it uses less digits than its factorization.

7720432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482535 (or 482529 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 25.

The square root of 7720432 is about 2778.5665369035. The cubic root of 7720432 is about 197.6425889067.

The spelling of 7720432 in words is "seven million, seven hundred twenty thousand, four hundred thirty-two".