72428883836 has 6 divisors (see below), whose sum is σ = 126750546720. Its totient is φ = 36214441916.

The previous prime is 72428883773. The next prime is 72428883881. The reversal of 72428883836 is 63838882427.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9053610476 + ... + 9053610483.

It is an arithmetic number, because the mean of its divisors is an integer number (21125091120).

Almost surely, 2^72428883836 is an apocalyptic number.

It is an amenable number.

72428883836 is a deficient number, since it is larger than the sum of its proper divisors (54321662884).

72428883836 is a wasteful number, since it uses less digits than its factorization.

72428883836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18107220963 (or 18107220961 counting only the distinct ones).

The product of its digits is 24772608, while the sum is 59.

The spelling of 72428883836 in words is "seventy-two billion, four hundred twenty-eight million, eight hundred eighty-three thousand, eight hundred thirty-six".