72178941 has 8 divisors (see below), whose sum is σ = 99557280. Its totient is φ = 46459952.

The previous prime is 72178933. The next prime is 72178949. The reversal of 72178941 is 14987127.

It is an interprime number because it is at equal distance from previous prime (72178933) and next prime (72178949).

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

It is a cyclic number.

It is not a de Polignac number, because 72178941 - 2³ = 72178933 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72178941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72178949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414735 + ... + 414908.

It is an arithmetic number, because the mean of its divisors is an integer number (12444660).

Almost surely, 2^72178941 is an apocalyptic number.

It is an amenable number.

72178941 is a deficient number, since it is larger than the sum of its proper divisors (27378339).

72178941 is a wasteful number, since it uses less digits than its factorization.

72178941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829675.

The product of its digits is 28224, while the sum is 39.

The square root of 72178941 is about 8495.8190305585. The cubic root of 72178941 is about 416.3611204922.

The spelling of 72178941 in words is "seventy-two million, one hundred seventy-eight thousand, nine hundred forty-one".