74229390 has 96 divisors (see below), whose sum is σ = 205994880. Its totient is φ = 18491328.

The previous prime is 74229377. The next prime is 74229401. The reversal of 74229390 is 9392247.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 141669 + ... + 142191.

It is an arithmetic number, because the mean of its divisors is an integer number (2145780).

Almost surely, 2^74229390 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74229390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102997440).

74229390 is an abundant number, since it is smaller than the sum of its proper divisors (131765490).

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

74229390 is a wasteful number, since it uses less digits than its factorization.

74229390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 74229390 is about 8615.6479733100. The cubic root of 74229390 is about 420.2670070900.

The spelling of 74229390 in words is "seventy-four million, two hundred twenty-nine thousand, three hundred ninety".