72743796 has 18 divisors (see below), whose sum is σ = 183880242. Its totient is φ = 24247920.

The previous prime is 72743791. The next prime is 72743819. The reversal of 72743796 is 69734727.

It is a happy number.

72743796 is a `hidden beast` number, since 7 + 274 + 379 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 62631396 + 10112400 = 7914^2 + 3180^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72743791) 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, 1010295 + ... + 1010366.

It is an arithmetic number, because the mean of its divisors is an integer number (10215569).

Almost surely, 2^72743796 is an apocalyptic number.

It is an amenable number.

72743796 is an abundant number, since it is smaller than the sum of its proper divisors (111136446).

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

72743796 is a wasteful number, since it uses less digits than its factorization.

72743796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020671 (or 2020666 counting only the distinct ones).

The product of its digits is 444528, while the sum is 45.

The square root of 72743796 is about 8528.9973619412. The cubic root of 72743796 is about 417.4444134583. Note that the first 4 decimals are identical.

Adding to 72743796 its sum of digits (45), we get a square (72743841 = 8529²).

The spelling of 72743796 in words is "seventy-two million, seven hundred forty-three thousand, seven hundred ninety-six".