74537920 has 56 divisors (see below), whose sum is σ = 181654704. Its totient is φ = 29116416.

The previous prime is 74537867. The next prime is 74537921. The reversal of 74537920 is 2973547.

It is a self number, because there is not a number n which added to its sum of digits gives 74537920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74537921) 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, 11052 + ... + 16468.

It is an arithmetic number, because the mean of its divisors is an integer number (3243834).

Almost surely, 2^74537920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74537920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90827352).

74537920 is an abundant number, since it is smaller than the sum of its proper divisors (107116784).

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

74537920 is a wasteful number, since it uses less digits than its factorization.

74537920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5477 (or 5467 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 74537920 is about 8633.5346179882. The cubic root of 74537920 is about 420.8484737443.

It can be divided in two parts, 74537 and 920, that added together give a palindrome (75457).

The spelling of 74537920 in words is "seventy-four million, five hundred thirty-seven thousand, nine hundred twenty".