72090530 has 16 divisors (see below), whose sum is σ = 130032000. Its totient is φ = 28776432.

The previous prime is 72090517. The next prime is 72090559. The reversal of 72090530 is 3509027.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72090530.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2234 + ... + 12213.

It is an arithmetic number, because the mean of its divisors is an integer number (8127000).

Almost surely, 2^72090530 is an apocalyptic number.

72090530 is a deficient number, since it is larger than the sum of its proper divisors (57941470).

72090530 is a wasteful number, since it uses less digits than its factorization.

72090530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14953.

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

The square root of 72090530 is about 8490.6142298423. The cubic root of 72090530 is about 416.1910526836.

Adding to 72090530 its reverse (3509027), we get a palindrome (75599557).

The spelling of 72090530 in words is "seventy-two million, ninety thousand, five hundred thirty".