72401432028 has 12 divisors (see below), whose sum is σ = 168936674760. Its totient is φ = 24133810672.

The previous prime is 72401432023. The next prime is 72401432041. The reversal of 72401432028 is 82023410427.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 72401432028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72401432021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3016726323 + ... + 3016726346.

It is an arithmetic number, because the mean of its divisors is an integer number (14078056230).

Almost surely, 2^72401432028 is an apocalyptic number.

It is an amenable number.

72401432028 is an abundant number, since it is smaller than the sum of its proper divisors (96535242732).

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

72401432028 is a wasteful number, since it uses less digits than its factorization.

72401432028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6033452676 (or 6033452674 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 33.

The spelling of 72401432028 in words is "seventy-two billion, four hundred one million, four hundred thirty-two thousand, twenty-eight".