72919426 has 8 divisors (see below), whose sum is σ = 115813260. Its totient is φ = 34315008.

The previous prime is 72919423. The next prime is 72919433. The reversal of 72919426 is 62491927.

It can be written as a sum of positive squares in 2 ways, for example, as 69305625 + 3613801 = 8325^2 + 1901^2 .

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

It is not an unprimeable number, because it can be changed into a prime (72919423) 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, 1072311 + ... + 1072378.

Almost surely, 2^72919426 is an apocalyptic number.

72919426 is a deficient number, since it is larger than the sum of its proper divisors (42893834).

72919426 is a wasteful number, since it uses less digits than its factorization.

72919426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144708.

The product of its digits is 54432, while the sum is 40.

The square root of 72919426 is about 8539.2872067872. The cubic root of 72919426 is about 417.7800976987.

The spelling of 72919426 in words is "seventy-two million, nine hundred nineteen thousand, four hundred twenty-six".