72872746 has 4 divisors (see below), whose sum is σ = 109309122. Its totient is φ = 36436372.

The previous prime is 72872741. The next prime is 72872749. The reversal of 72872746 is 64727827.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 67420521 + 5452225 = 8211^2 + 2335^2 .

It is not an unprimeable number, because it can be changed into a prime (72872741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18218185 + ... + 18218188.

Almost surely, 2^72872746 is an apocalyptic number.

72872746 is a deficient number, since it is larger than the sum of its proper divisors (36436376).

72872746 is a wasteful number, since it uses less digits than its factorization.

72872746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36436375.

The product of its digits is 263424, while the sum is 43.

The square root of 72872746 is about 8536.5535200103. The cubic root of 72872746 is about 417.6909301569.

The spelling of 72872746 in words is "seventy-two million, eight hundred seventy-two thousand, seven hundred forty-six".