74104220 has 24 divisors (see below), whose sum is σ = 159416208. Its totient is φ = 28918400.

The previous prime is 74104213. The next prime is 74104223. The reversal of 74104220 is 2240147.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 74104192 and 74104201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74104223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44366 + ... + 46005.

It is an arithmetic number, because the mean of its divisors is an integer number (6642342).

Almost surely, 2^74104220 is an apocalyptic number.

It is an amenable number.

74104220 is an abundant number, since it is smaller than the sum of its proper divisors (85311988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74104220 is a wasteful number, since it uses less digits than its factorization.

74104220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90421 (or 90419 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 74104220 is about 8608.3808001273. The cubic root of 74104220 is about 420.0306478013.

Adding to 74104220 its reverse (2240147), we get a palindrome (76344367).

The spelling of 74104220 in words is "seventy-four million, one hundred four thousand, two hundred twenty".