72239406 has 32 divisors (see below), whose sum is σ = 157334400. Its totient is φ = 22024800.

The previous prime is 72239381. The next prime is 72239411. The reversal of 72239406 is 60493227.

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 15 ways as a sum of consecutive naturals, for example, 7620 + ... + 14231.

It is an arithmetic number, because the mean of its divisors is an integer number (4916700).

Almost surely, 2^72239406 is an apocalyptic number.

72239406 is an abundant number, since it is smaller than the sum of its proper divisors (85094994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72239406 is a wasteful number, since it uses less digits than its factorization.

72239406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21904.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 72239406 is about 8499.3768006837. The cubic root of 72239406 is about 416.4773512941.

The spelling of 72239406 in words is "seventy-two million, two hundred thirty-nine thousand, four hundred six".