72438303030 has 64 divisors (see below), whose sum is σ = 178226915328. Its totient is φ = 18833901440.

The previous prime is 72438302987. The next prime is 72438303139. The reversal of 72438303030 is 3030383427.

It is a super-2 number, since 2×72438303030² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72438302982 and 72438303000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 273160 + ... + 468500.

It is an arithmetic number, because the mean of its divisors is an integer number (2784795552).

Almost surely, 2^72438303030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72438303030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89113457664).

72438303030 is an abundant number, since it is smaller than the sum of its proper divisors (105788612298).

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

72438303030 is a wasteful number, since it uses less digits than its factorization.

72438303030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195661.

The product of its (nonzero) digits is 36288, while the sum is 33.

Adding to 72438303030 its reverse (3030383427), we get a palindrome (75468686457).

The spelling of 72438303030 in words is "seventy-two billion, four hundred thirty-eight million, three hundred three thousand, thirty".