72216490 has 8 divisors (see below), whose sum is σ = 129989700. Its totient is φ = 28886592.

The previous prime is 72216449. The next prime is 72216499. The reversal of 72216490 is 9461227.

It can be written as a sum of positive squares in 2 ways, for example, as 64593369 + 7623121 = 8037^2 + 2761^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72216499) 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, 3610815 + ... + 3610834.

Almost surely, 2^72216490 is an apocalyptic number.

72216490 is a deficient number, since it is larger than the sum of its proper divisors (57773210).

72216490 is a wasteful number, since it uses less digits than its factorization.

72216490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7221656.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 72216490 is about 8498.0285949154. The cubic root of 72216490 is about 416.4333079070.

The spelling of 72216490 in words is "seventy-two million, two hundred sixteen thousand, four hundred ninety".