73207144 has 8 divisors (see below), whose sum is σ = 137263410. Its totient is φ = 36603568.

The previous prime is 73207139. The next prime is 73207157. The reversal of 73207144 is 44170237.

It can be written as a sum of positive squares in only one way, i.e., 51696100 + 21511044 = 7190^2 + 4638^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4575439 + ... + 4575454.

Almost surely, 2^73207144 is an apocalyptic number.

It is an amenable number.

73207144 is a deficient number, since it is larger than the sum of its proper divisors (64056266).

73207144 is a wasteful number, since it uses less digits than its factorization.

73207144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9150899 (or 9150895 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 73207144 is about 8556.1173437489. The cubic root of 73207144 is about 418.3288545558.

The spelling of 73207144 in words is "seventy-three million, two hundred seven thousand, one hundred forty-four".