72840254 has 4 divisors (see below), whose sum is σ = 109260384. Its totient is φ = 36420126.

The previous prime is 72840247. The next prime is 72840259. The reversal of 72840254 is 45204827.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 72840254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72840259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18210062 + ... + 18210065.

It is an arithmetic number, because the mean of its divisors is an integer number (27315096).

Almost surely, 2^72840254 is an apocalyptic number.

72840254 is a deficient number, since it is larger than the sum of its proper divisors (36420130).

72840254 is a wasteful number, since it uses less digits than its factorization.

72840254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36420129.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 72840254 is about 8534.6501978699. The cubic root of 72840254 is about 417.6288418728.

The spelling of 72840254 in words is "seventy-two million, eight hundred forty thousand, two hundred fifty-four".