104421638 has 4 divisors (see below), whose sum is σ = 156632460. Its totient is φ = 52210818.

The previous prime is 104421637. The next prime is 104421641. The reversal of 104421638 is 836124401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836124401 = 7 ⋅119446343.

It is a self number, because there is not a number n which added to its sum of digits gives 104421638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104421631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26105408 + ... + 26105411.

It is an arithmetic number, because the mean of its divisors is an integer number (39158115).

Almost surely, 2^104421638 is an apocalyptic number.

104421638 is a deficient number, since it is larger than the sum of its proper divisors (52210822).

104421638 is an equidigital number, since it uses as much as digits as its factorization.

104421638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52210821.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 104421638 is about 10218.6906206226. The cubic root of 104421638 is about 470.9016011766.

The spelling of 104421638 in words is "one hundred four million, four hundred twenty-one thousand, six hundred thirty-eight".