72405030 has 32 divisors (see below), whose sum is σ = 174419424. Its totient is φ = 19236096.

The previous prime is 72405017. The next prime is 72405031. The reversal of 72405030 is 3050427.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 72404988 and 72405006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72405031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3954 + ... + 12666.

It is an arithmetic number, because the mean of its divisors is an integer number (5450607).

Almost surely, 2^72405030 is an apocalyptic number.

72405030 is an abundant number, since it is smaller than the sum of its proper divisors (102014394).

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

72405030 is a wasteful number, since it uses less digits than its factorization.

72405030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9000.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 72405030 is about 8509.1145250255. The cubic root of 72405030 is about 416.7953956029.

Adding to 72405030 its reverse (3050427), we get a palindrome (75455457).

The spelling of 72405030 in words is "seventy-two million, four hundred five thousand, thirty".