72751858 has 4 divisors (see below), whose sum is σ = 109127790. Its totient is φ = 36375928.

The previous prime is 72751841. The next prime is 72751859. The reversal of 72751858 is 85815727.

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., 53100369 + 19651489 = 7287^2 + 4433^2 .

It is not an unprimeable number, because it can be changed into a prime (72751859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18187963 + ... + 18187966.

Almost surely, 2^72751858 is an apocalyptic number.

72751858 is a deficient number, since it is larger than the sum of its proper divisors (36375932).

72751858 is a wasteful number, since it uses less digits than its factorization.

72751858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36375931.

The product of its digits is 156800, while the sum is 43.

The square root of 72751858 is about 8529.4699718095. The cubic root of 72751858 is about 417.4598343039.

The spelling of 72751858 in words is "seventy-two million, seven hundred fifty-one thousand, eight hundred fifty-eight".