72249878 has 8 divisors (see below), whose sum is σ = 109024272. Its totient is φ = 35908456.

The previous prime is 72249869. The next prime is 72249883. The reversal of 72249878 is 87894227.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107825 + ... + 108492.

It is an arithmetic number, because the mean of its divisors is an integer number (13628034).

Almost surely, 2^72249878 is an apocalyptic number.

72249878 is a deficient number, since it is larger than the sum of its proper divisors (36774394).

72249878 is a wasteful number, since it uses less digits than its factorization.

72249878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216486.

The product of its digits is 451584, while the sum is 47.

The square root of 72249878 is about 8499.9928235264. The cubic root of 72249878 is about 416.4974748450.

The spelling of 72249878 in words is "seventy-two million, two hundred forty-nine thousand, eight hundred seventy-eight".