73671638 has 4 divisors (see below), whose sum is σ = 110507460. Its totient is φ = 36835818.

The previous prime is 73671617. The next prime is 73671667. The reversal of 73671638 is 83617637.

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

It is a junction number, because it is equal to n+sod(n) for n = 73671595 and 73671604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18417908 + ... + 18417911.

It is an arithmetic number, because the mean of its divisors is an integer number (27626865).

Almost surely, 2^73671638 is an apocalyptic number.

73671638 is a deficient number, since it is larger than the sum of its proper divisors (36835822).

73671638 is a wasteful number, since it uses less digits than its factorization.

73671638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36835821.

The product of its digits is 127008, while the sum is 41.

The square root of 73671638 is about 8583.2183940524. The cubic root of 73671638 is about 419.2117452653.

The spelling of 73671638 in words is "seventy-three million, six hundred seventy-one thousand, six hundred thirty-eight".