72749285 has 8 divisors (see below), whose sum is σ = 99770496. Its totient is φ = 49885200.

The previous prime is 72749177. The next prime is 72749297. The reversal of 72749285 is 58294727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72749285 - 2¹⁰ = 72748261 is a prime.

It is a super-2 number, since 2×72749285² = 10584916936022450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039241 + ... + 1039310.

It is an arithmetic number, because the mean of its divisors is an integer number (12471312).

Almost surely, 2^72749285 is an apocalyptic number.

It is an amenable number.

72749285 is a deficient number, since it is larger than the sum of its proper divisors (27021211).

72749285 is a wasteful number, since it uses less digits than its factorization.

72749285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2078563.

The product of its digits is 282240, while the sum is 44.

The square root of 72749285 is about 8529.3191404707. The cubic root of 72749285 is about 417.4549128406.

The spelling of 72749285 in words is "seventy-two million, seven hundred forty-nine thousand, two hundred eighty-five".