74222388 has 18 divisors (see below), whose sum is σ = 187617794. Its totient is φ = 24740784.

The previous prime is 74222381. The next prime is 74222411. The reversal of 74222388 is 88322247.

It can be written as a sum of positive squares in only one way, i.e., 53319204 + 20903184 = 7302^2 + 4572^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2061733 = 74222388 / (7 + 4 + 2 + 2 + 2 + 3 + 8 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74222381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1030831 + ... + 1030902.

Almost surely, 2^74222388 is an apocalyptic number.

It is an amenable number.

74222388 is an abundant number, since it is smaller than the sum of its proper divisors (113395406).

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

74222388 is a wasteful number, since it uses less digits than its factorization.

74222388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061743 (or 2061738 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 74222388 is about 8615.2416100769. The cubic root of 74222388 is about 420.2537921891.

The spelling of 74222388 in words is "seventy-four million, two hundred twenty-two thousand, three hundred eighty-eight".