72026813 has 8 divisors (see below), whose sum is σ = 72790080. Its totient is φ = 71267040.

The previous prime is 72026789. The next prime is 72026821. The reversal of 72026813 is 31862027.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72026813 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72026863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63233 + ... + 64361.

It is an arithmetic number, because the mean of its divisors is an integer number (9098760).

Almost surely, 2^72026813 is an apocalyptic number.

It is an amenable number.

72026813 is a deficient number, since it is larger than the sum of its proper divisors (763267).

72026813 is a wasteful number, since it uses less digits than its factorization.

72026813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 72026813 is about 8486.8611983465. The cubic root of 72026813 is about 416.0684001341.

The spelling of 72026813 in words is "seventy-two million, twenty-six thousand, eight hundred thirteen".