791638 has 8 divisors (see below), whose sum is σ = 1199520. Its totient is φ = 391800.

The previous prime is 791629. The next prime is 791657. The reversal of 791638 is 836197.

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, 1758 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (149940).

2⁷⁹¹⁶³⁸ is an apocalyptic number.

791638 is a deficient number, since it is larger than the sum of its proper divisors (407882).

791638 is a wasteful number, since it uses less digits than its factorization.

791638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022.

The product of its digits is 9072, while the sum is 34.

The square root of 791638 is about 889.7404115808. The cubic root of 791638 is about 92.5072017767.

The spelling of 791638 in words is "seven hundred ninety-one thousand, six hundred thirty-eight".