72673278 has 16 divisors (see below), whose sum is σ = 145533456. Its totient is φ = 24193280.

The previous prime is 72673277. The next prime is 72673303. The reversal of 72673278 is 87237627.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72673277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2451 + ... + 12302.

It is an arithmetic number, because the mean of its divisors is an integer number (9095841).

Almost surely, 2^72673278 is an apocalyptic number.

72673278 is an abundant number, since it is smaller than the sum of its proper divisors (72860178).

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

72673278 is a wasteful number, since it uses less digits than its factorization.

72673278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15579.

The product of its digits is 197568, while the sum is 42.

The square root of 72673278 is about 8524.8623449297. The cubic root of 72673278 is about 417.3094793283.

The spelling of 72673278 in words is "seventy-two million, six hundred seventy-three thousand, two hundred seventy-eight".