72418726 has 4 divisors (see below), whose sum is σ = 108628092. Its totient is φ = 36209362.

The previous prime is 72418721. The next prime is 72418727. The reversal of 72418726 is 62781427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62781427 = 541 ⋅116047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72418721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18104680 + ... + 18104683.

It is an arithmetic number, because the mean of its divisors is an integer number (27157023).

Almost surely, 2^72418726 is an apocalyptic number.

72418726 is a deficient number, since it is larger than the sum of its proper divisors (36209366).

72418726 is a wasteful number, since it uses less digits than its factorization.

72418726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36209365.

The product of its digits is 37632, while the sum is 37.

The square root of 72418726 is about 8509.9192710624. The cubic root of 72418726 is about 416.8216740252.

The spelling of 72418726 in words is "seventy-two million, four hundred eighteen thousand, seven hundred twenty-six".