72738356 has 6 divisors (see below), whose sum is σ = 127292130. Its totient is φ = 36369176.

The previous prime is 72738343. The next prime is 72738377. The reversal of 72738356 is 65383727.

It can be written as a sum of positive squares in only one way, i.e., 56010256 + 16728100 = 7484^2 + 4090^2 .

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 as a sum of consecutive naturals, namely, 9092291 + ... + 9092298.

It is an arithmetic number, because the mean of its divisors is an integer number (21215355).

Almost surely, 2^72738356 is an apocalyptic number.

It is an amenable number.

72738356 is a deficient number, since it is larger than the sum of its proper divisors (54553774).

72738356 is a wasteful number, since it uses less digits than its factorization.

72738356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18184593 (or 18184591 counting only the distinct ones).

The product of its digits is 211680, while the sum is 41.

The square root of 72738356 is about 8528.6784439326. The cubic root of 72738356 is about 417.4340072824.

The spelling of 72738356 in words is "seventy-two million, seven hundred thirty-eight thousand, three hundred fifty-six".