72530090 has 8 divisors (see below), whose sum is σ = 130554180. Its totient is φ = 29012032.

The previous prime is 72530089. The next prime is 72530093. The reversal of 72530090 is 9003527.

It can be written as a sum of positive squares in 2 ways, for example, as 59706529 + 12823561 = 7727^2 + 3581^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×72530090² = 10521227910816200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72530093) 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, 3626495 + ... + 3626514.

Almost surely, 2^72530090 is an apocalyptic number.

72530090 is a deficient number, since it is larger than the sum of its proper divisors (58024090).

72530090 is a wasteful number, since it uses less digits than its factorization.

72530090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7253016.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 72530090 is about 8516.4599453059. The cubic root of 72530090 is about 417.0352244780.

The spelling of 72530090 in words is "seventy-two million, five hundred thirty thousand, ninety".