72878441 has 4 divisors (see below), whose sum is σ = 73325712. Its totient is φ = 72431172.

The previous prime is 72878431. The next prime is 72878453. The reversal of 72878441 is 14487827.

It is a happy number.

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 72878441 - 2¹⁰ = 72877417 is a prime.

It is a super-3 number, since 3×72878441³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72878411) 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, 223391 + ... + 223716.

It is an arithmetic number, because the mean of its divisors is an integer number (18331428).

Almost surely, 2^72878441 is an apocalyptic number.

It is an amenable number.

72878441 is a deficient number, since it is larger than the sum of its proper divisors (447271).

72878441 is a wasteful number, since it uses less digits than its factorization.

72878441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447270.

The product of its digits is 100352, while the sum is 41.

The square root of 72878441 is about 8536.8870790236. The cubic root of 72878441 is about 417.7018107125.

The spelling of 72878441 in words is "seventy-two million, eight hundred seventy-eight thousand, four hundred forty-one".