7639445 has 8 divisors (see below), whose sum is σ = 10000800. Its totient is φ = 5555920.

The previous prime is 7639439. The next prime is 7639481. The reversal of 7639445 is 5449367.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7639445 - 2⁸ = 7639189 is a prime.

It is a super-2 number, since 2×7639445² = 116722239816050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7639399 and 7639408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69395 + ... + 69504.

It is an arithmetic number, because the mean of its divisors is an integer number (1250100).

Almost surely, 2^7639445 is an apocalyptic number.

It is an amenable number.

7639445 is a deficient number, since it is larger than the sum of its proper divisors (2361355).

7639445 is a wasteful number, since it uses less digits than its factorization.

7639445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138915.

The product of its digits is 90720, while the sum is 38.

The square root of 7639445 is about 2763.9545944172. The cubic root of 7639445 is about 196.9490708101.

The spelling of 7639445 in words is "seven million, six hundred thirty-nine thousand, four hundred forty-five".