72842356 has 6 divisors (see below), whose sum is σ = 127474130. Its totient is φ = 36421176.

The previous prime is 72842353. The next prime is 72842369. The reversal of 72842356 is 65324827.

It can be written as a sum of positive squares in only one way, i.e., 60310756 + 12531600 = 7766^2 + 3540^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72842351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9105291 + ... + 9105298.

Almost surely, 2^72842356 is an apocalyptic number.

It is an amenable number.

72842356 is a deficient number, since it is larger than the sum of its proper divisors (54631774).

72842356 is a wasteful number, since it uses less digits than its factorization.

72842356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18210593 (or 18210591 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 72842356 is about 8534.7733420402. The cubic root of 72842356 is about 417.6328590992.

The spelling of 72842356 in words is "seventy-two million, eight hundred forty-two thousand, three hundred fifty-six".