72748134 has 48 divisors (see below), whose sum is σ = 172298880. Its totient is φ = 22083840.

The previous prime is 72748133. The next prime is 72748139. The reversal of 72748134 is 43184727.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72748133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5652 + ... + 13320.

It is an arithmetic number, because the mean of its divisors is an integer number (3589560).

Almost surely, 2^72748134 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72748134, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86149440).

72748134 is an abundant number, since it is smaller than the sum of its proper divisors (99550746).

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

72748134 is a wasteful number, since it uses less digits than its factorization.

72748134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7725 (or 7722 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 72748134 is about 8529.2516670573. The cubic root of 72748134 is about 417.4527112467.

The spelling of 72748134 in words is "seventy-two million, seven hundred forty-eight thousand, one hundred thirty-four".