73440757 has 12 divisors (see below), whose sum is σ = 83477100. Its totient is φ = 64219392.

The previous prime is 73440709. The next prime is 73440769. The reversal of 73440757 is 75704437.

It can be written as a sum of positive squares in 2 ways, for example, as 11566801 + 61873956 = 3401^2 + 7866^2 .

It is not a de Polignac number, because 73440757 - 2¹¹ = 73438709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73440707) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3132 + ... + 12517.

It is an arithmetic number, because the mean of its divisors is an integer number (6956425).

Almost surely, 2^73440757 is an apocalyptic number.

It is an amenable number.

73440757 is a deficient number, since it is larger than the sum of its proper divisors (10036343).

73440757 is a wasteful number, since it uses less digits than its factorization.

73440757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15700 (or 15681 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 37.

The square root of 73440757 is about 8569.7582813053. The cubic root of 73440757 is about 418.7733616728.

The spelling of 73440757 in words is "seventy-three million, four hundred forty thousand, seven hundred fifty-seven".