72782019 has 6 divisors (see below), whose sum is σ = 105129596. Its totient is φ = 48521340.

The previous prime is 72781999. The next prime is 72782041. The reversal of 72782019 is 91028727.

It is not a de Polignac number, because 72782019 - 2⁸ = 72781763 is a prime.

It is a super-2 number, since 2×72782019² = 10594444579432722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72782069) 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 5 ways as a sum of consecutive naturals, for example, 4043437 + ... + 4043454.

Almost surely, 2^72782019 is an apocalyptic number.

72782019 is a deficient number, since it is larger than the sum of its proper divisors (32347577).

72782019 is a wasteful number, since it uses less digits than its factorization.

72782019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8086897 (or 8086894 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 72782019 is about 8531.2378351562. The cubic root of 72782019 is about 417.5175156097.

The spelling of 72782019 in words is "seventy-two million, seven hundred eighty-two thousand, nineteen".