72500030 has 32 divisors (see below), whose sum is σ = 133293600. Its totient is φ = 28385280.

The previous prime is 72500027. The next prime is 72500033. The reversal of 72500030 is 3000527.

It is an interprime number because it is at equal distance from previous prime (72500027) and next prime (72500033).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 72499981 and 72500008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72500033) 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, 161246 + ... + 161694.

It is an arithmetic number, because the mean of its divisors is an integer number (4165425).

Almost surely, 2^72500030 is an apocalyptic number.

72500030 is a deficient number, since it is larger than the sum of its proper divisors (60793570).

72500030 is a wasteful number, since it uses less digits than its factorization.

72500030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 210, while the sum is 17.

The square root of 72500030 is about 8514.6949446237. The cubic root of 72500030 is about 416.9776032843.

Adding to 72500030 its reverse (3000527), we get a palindrome (75500557).

The spelling of 72500030 in words is "seventy-two million, five hundred thousand, thirty".