72420006 has 16 divisors (see below), whose sum is σ = 146334384. Its totient is φ = 23890944.

The previous prime is 72419959. The next prime is 72420013. The reversal of 72420006 is 60002427.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 61635 + ... + 62798.

It is an arithmetic number, because the mean of its divisors is an integer number (9145899).

Almost surely, 2^72420006 is an apocalyptic number.

72420006 is an abundant number, since it is smaller than the sum of its proper divisors (73914378).

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

72420006 is a wasteful number, since it uses less digits than its factorization.

72420006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124535.

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 72420006 is about 8509.9944770840. The cubic root of 72420006 is about 416.8241297832.

The spelling of 72420006 in words is "seventy-two million, four hundred twenty thousand, six".