72838855 has 4 divisors (see below), whose sum is σ = 87406632. Its totient is φ = 58271080.

The previous prime is 72838847. The next prime is 72838879. The reversal of 72838855 is 55883827.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 72838855 - 2³ = 72838847 is a prime.

It is a super-2 number, since 2×72838855² = 10610997595422050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7283881 + ... + 7283890.

It is an arithmetic number, because the mean of its divisors is an integer number (21851658).

Almost surely, 2^72838855 is an apocalyptic number.

72838855 is a deficient number, since it is larger than the sum of its proper divisors (14567777).

72838855 is a wasteful number, since it uses less digits than its factorization.

72838855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14567776.

The product of its digits is 537600, while the sum is 46.

The square root of 72838855 is about 8534.5682374681. The cubic root of 72838855 is about 417.6261681384.

The spelling of 72838855 in words is "seventy-two million, eight hundred thirty-eight thousand, eight hundred fifty-five".