72783490 has 64 divisors (see below), whose sum is σ = 150796800. Its totient is φ = 25069824.

The previous prime is 72783481. The next prime is 72783559. The reversal of 72783490 is 9438727.

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

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 194944 + ... + 195316.

It is an arithmetic number, because the mean of its divisors is an integer number (2356200).

Almost surely, 2^72783490 is an apocalyptic number.

72783490 is an abundant number, since it is smaller than the sum of its proper divisors (78013310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72783490 is a wasteful number, since it uses less digits than its factorization.

72783490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 72783490 is about 8531.3240472977. The cubic root of 72783490 is about 417.5203284113.

The spelling of 72783490 in words is "seventy-two million, seven hundred eighty-three thousand, four hundred ninety".