73724442 has 32 divisors (see below), whose sum is σ = 162100224. Its totient is φ = 22167600.

The previous prime is 73724419. The next prime is 73724471. The reversal of 73724442 is 24442737.

It is a super-2 number, since 2×73724442² = 10870586696422728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4383 + ... + 12909.

It is an arithmetic number, because the mean of its divisors is an integer number (5065632).

Almost surely, 2^73724442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73724442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81050112).

73724442 is an abundant number, since it is smaller than the sum of its proper divisors (88375782).

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

73724442 is a wasteful number, since it uses less digits than its factorization.

73724442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8674.

The product of its digits is 37632, while the sum is 33.

The square root of 73724442 is about 8586.2938454260. The cubic root of 73724442 is about 419.3118777408.

The spelling of 73724442 in words is "seventy-three million, seven hundred twenty-four thousand, four hundred forty-two".