73718240 has 48 divisors (see below), whose sum is σ = 174726720. Its totient is φ = 29391360.

The previous prime is 73718237. The next prime is 73718257. The reversal of 73718240 is 4281737.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 73718197 and 73718206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68426 + ... + 69494.

It is an arithmetic number, because the mean of its divisors is an integer number (3640140).

Almost surely, 2^73718240 is an apocalyptic number.

It is an amenable number.

73718240 is an abundant number, since it is smaller than the sum of its proper divisors (101008480).

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

73718240 is a wasteful number, since it uses less digits than its factorization.

73718240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1515 (or 1507 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 73718240 is about 8585.9326808449. The cubic root of 73718240 is about 419.3001193373.

Adding to 73718240 its reverse (4281737), we get a palindrome (77999977).

The spelling of 73718240 in words is "seventy-three million, seven hundred eighteen thousand, two hundred forty".