72278943 has 8 divisors (see below), whose sum is σ = 105133056. Its totient is φ = 43805400.

The previous prime is 72278897. The next prime is 72278957. The reversal of 72278943 is 34987227.

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

It is not a de Polignac number, because 72278943 - 2¹² = 72274847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72278895 and 72278904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72278993) 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, 1095103 + ... + 1095168.

It is an arithmetic number, because the mean of its divisors is an integer number (13141632).

Almost surely, 2^72278943 is an apocalyptic number.

72278943 is a deficient number, since it is larger than the sum of its proper divisors (32854113).

72278943 is a wasteful number, since it uses less digits than its factorization.

72278943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2190285.

The product of its digits is 169344, while the sum is 42.

The square root of 72278943 is about 8501.7023589396. The cubic root of 72278943 is about 416.5533175053.

The spelling of 72278943 in words is "seventy-two million, two hundred seventy-eight thousand, nine hundred forty-three".