72061830 has 24 divisors (see below), whose sum is σ = 187360992. Its totient is φ = 19216464.

The previous prime is 72061823. The next prime is 72061841. The reversal of 72061830 is 3816027.

It is a junction number, because it is equal to n+sod(n) for n = 72061794 and 72061803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 400254 + ... + 400433.

It is an arithmetic number, because the mean of its divisors is an integer number (7806708).

Almost surely, 2^72061830 is an apocalyptic number.

72061830 is an abundant number, since it is smaller than the sum of its proper divisors (115299162).

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

72061830 is a wasteful number, since it uses less digits than its factorization.

72061830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800700 (or 800697 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 72061830 is about 8488.9239600788. The cubic root of 72061830 is about 416.1358153375.

Adding to 72061830 its reverse (3816027), we get a palindrome (75877857).

The spelling of 72061830 in words is "seventy-two million, sixty-one thousand, eight hundred thirty".