72643262 has 4 divisors (see below), whose sum is σ = 108964896. Its totient is φ = 36321630.

The previous prime is 72643237. The next prime is 72643271. The reversal of 72643262 is 26234627.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26234627 = 4493 ⋅5839.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18160814 + ... + 18160817.

It is an arithmetic number, because the mean of its divisors is an integer number (27241224).

Almost surely, 2^72643262 is an apocalyptic number.

72643262 is a deficient number, since it is larger than the sum of its proper divisors (36321634).

72643262 is a wasteful number, since it uses less digits than its factorization.

72643262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36321633.

The product of its digits is 24192, while the sum is 32.

The square root of 72643262 is about 8523.1016654737. The cubic root of 72643262 is about 417.2520181056.

Adding to 72643262 its reverse (26234627), we get a palindrome (98877889).

The spelling of 72643262 in words is "seventy-two million, six hundred forty-three thousand, two hundred sixty-two".