72890247 has 8 divisors (see below), whose sum is σ = 97310080. Its totient is φ = 48531960.

The previous prime is 72890239. The next prime is 72890273. The reversal of 72890247 is 74209827.

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

It is not a de Polignac number, because 72890247 - 2³ = 72890239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72890227) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 12547 + ... + 17412.

It is an arithmetic number, because the mean of its divisors is an integer number (12163760).

Almost surely, 2^72890247 is an apocalyptic number.

72890247 is a deficient number, since it is larger than the sum of its proper divisors (24419833).

72890247 is a wasteful number, since it uses less digits than its factorization.

72890247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30773.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 72890247 is about 8537.5785208688. The cubic root of 72890247 is about 417.7243648050.

It can be divided in two parts, 72890 and 247, that added together give a palindrome (73137).

The spelling of 72890247 in words is "seventy-two million, eight hundred ninety thousand, two hundred forty-seven".