73042140 has 48 divisors (see below), whose sum is σ = 205148160. Its totient is φ = 19417920.

The previous prime is 73042133. The next prime is 73042147. The reversal of 73042140 is 4124037.

It is an interprime number because it is at equal distance from previous prime (73042133) and next prime (73042147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73042147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19845 + ... + 23235.

It is an arithmetic number, because the mean of its divisors is an integer number (4273920).

Almost surely, 2^73042140 is an apocalyptic number.

It is an amenable number.

73042140 is an abundant number, since it is smaller than the sum of its proper divisors (132106020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

73042140 is a wasteful number, since it uses less digits than its factorization.

73042140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3762 (or 3760 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 73042140 is about 8546.4694465025. The cubic root of 73042140 is about 418.0143230519.

Adding to 73042140 its reverse (4124037), we get a palindrome (77166177).

The spelling of 73042140 in words is "seventy-three million, forty-two thousand, one hundred forty".