7638479 has 4 divisors (see below), whose sum is σ = 7696920. Its totient is φ = 7580040.

The previous prime is 7638473. The next prime is 7638497. The reversal of 7638479 is 9748367.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7638479 is a prime.

It is a super-2 number, since 2×7638479² = 116692722866882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7638473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29024 + ... + 29285.

It is an arithmetic number, because the mean of its divisors is an integer number (1924230).

Almost surely, 2^7638479 is an apocalyptic number.

7638479 is a deficient number, since it is larger than the sum of its proper divisors (58441).

7638479 is a wasteful number, since it uses less digits than its factorization.

7638479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58440.

The product of its digits is 254016, while the sum is 44.

The square root of 7638479 is about 2763.7798392781. The cubic root of 7638479 is about 196.9407691240.

The spelling of 7638479 in words is "seven million, six hundred thirty-eight thousand, four hundred seventy-nine".