72250889 has 4 divisors (see below), whose sum is σ = 75392256. Its totient is φ = 69109524.

The previous prime is 72250883. The next prime is 72250909. The reversal of 72250889 is 98805227.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98805227 = 8161 ⋅12107.

It is a cyclic number.

It is not a de Polignac number, because 72250889 - 2¹² = 72246793 is a prime.

It is a super-2 number, since 2×72250889² = 10440381922580642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72250883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1570649 + ... + 1570694.

It is an arithmetic number, because the mean of its divisors is an integer number (18848064).

Almost surely, 2^72250889 is an apocalyptic number.

It is an amenable number.

72250889 is a deficient number, since it is larger than the sum of its proper divisors (3141367).

72250889 is a wasteful number, since it uses less digits than its factorization.

72250889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141366.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 72250889 is about 8500.0522939568. The cubic root of 72250889 is about 416.4994175333.

The spelling of 72250889 in words is "seventy-two million, two hundred fifty thousand, eight hundred eighty-nine".