72069426 has 192 divisors, whose sum is σ = 204736896. Its totient is φ = 18662400.

The previous prime is 72069407. The next prime is 72069449. The reversal of 72069426 is 62496027.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1181436 + ... + 1181496.

It is an arithmetic number, because the mean of its divisors is an integer number (1066338).

Almost surely, 2^72069426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72069426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102368448).

72069426 is an abundant number, since it is smaller than the sum of its proper divisors (132667470).

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

72069426 is a wasteful number, since it uses less digits than its factorization.

72069426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 72069426 is about 8489.3713548177. The cubic root of 72069426 is about 416.1504363770.

The spelling of 72069426 in words is "seventy-two million, sixty-nine thousand, four hundred twenty-six".