72878633 has 4 divisors (see below), whose sum is σ = 73315200. Its totient is φ = 72442068.

The previous prime is 72878579. The next prime is 72878669. The reversal of 72878633 is 33687827.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72878633 - 2¹² = 72874537 is a prime.

It is a super-2 number, since 2×72878633² = 10622590295897378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72878833) 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, 218033 + ... + 218366.

It is an arithmetic number, because the mean of its divisors is an integer number (18328800).

Almost surely, 2^72878633 is an apocalyptic number.

It is an amenable number.

72878633 is a deficient number, since it is larger than the sum of its proper divisors (436567).

72878633 is a wasteful number, since it uses less digits than its factorization.

72878633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436566.

The product of its digits is 338688, while the sum is 44.

The square root of 72878633 is about 8536.8983243330. The cubic root of 72878633 is about 417.7021775273.

The spelling of 72878633 in words is "seventy-two million, eight hundred seventy-eight thousand, six hundred thirty-three".