75638638 has 8 divisors (see below), whose sum is σ = 113598288. Its totient is φ = 37772544.

The previous prime is 75638623. The next prime is 75638653. The reversal of 75638638 is 83683657.

It is an interprime number because it is at equal distance from previous prime (75638623) and next prime (75638653).

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

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, 21331 + ... + 24622.

It is an arithmetic number, because the mean of its divisors is an integer number (14199786).

Almost surely, 2^75638638 is an apocalyptic number.

75638638 is a deficient number, since it is larger than the sum of its proper divisors (37959650).

75638638 is a wasteful number, since it uses less digits than its factorization.

75638638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46778.

The product of its digits is 725760, while the sum is 46.

The square root of 75638638 is about 8697.0476599821. The cubic root of 75638638 is about 422.9099469803.

The spelling of 75638638 in words is "seventy-five million, six hundred thirty-eight thousand, six hundred thirty-eight".