72858011 has 4 divisors (see below), whose sum is σ = 73945512. Its totient is φ = 71770512.

The previous prime is 72857969. The next prime is 72858047. The reversal of 72858011 is 11085827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11085827 = 569 ⋅19483.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72858011 is a prime.

It is a super-2 number, since 2×72858011² = 10616579533752242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72858061) 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, 543650 + ... + 543783.

It is an arithmetic number, because the mean of its divisors is an integer number (18486378).

Almost surely, 2^72858011 is an apocalyptic number.

72858011 is a deficient number, since it is larger than the sum of its proper divisors (1087501).

72858011 is a wasteful number, since it uses less digits than its factorization.

72858011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087500.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 72858011 is about 8535.6904231585. The cubic root of 72858011 is about 417.6627756407.

The spelling of 72858011 in words is "seventy-two million, eight hundred fifty-eight thousand, eleven".