72909050 has 24 divisors (see below), whose sum is σ = 135989436. Its totient is φ = 29082240.

The previous prime is 72909019. The next prime is 72909059. The reversal of 72909050 is 5090927.

It can be written as a sum of positive squares in 6 ways, for example, as 14737921 + 58171129 = 3839^2 + 7627^2 .

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 72908998 and 72909016.

It is not an unprimeable number, because it can be changed into a prime (72909059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18014 + ... + 21686.

Almost surely, 2^72909050 is an apocalyptic number.

72909050 is a deficient number, since it is larger than the sum of its proper divisors (63080386).

72909050 is a wasteful number, since it uses less digits than its factorization.

72909050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4082 (or 4077 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 32.

The square root of 72909050 is about 8538.6796403191. The cubic root of 72909050 is about 417.7602808856.

Adding to 72909050 its reverse (5090927), we get a palindrome (77999977).

The spelling of 72909050 in words is "seventy-two million, nine hundred nine thousand, fifty".