73872140 has 24 divisors (see below), whose sum is σ = 164257632. Its totient is φ = 27810560.

The previous prime is 73872137. The next prime is 73872167. The reversal of 73872140 is 4127837.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 73872097 and 73872106.

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, 108296 + ... + 108975.

It is an arithmetic number, because the mean of its divisors is an integer number (6844068).

Almost surely, 2^73872140 is an apocalyptic number.

It is an amenable number.

73872140 is an abundant number, since it is smaller than the sum of its proper divisors (90385492).

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

73872140 is a wasteful number, since it uses less digits than its factorization.

73872140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217297 (or 217295 counting only the distinct ones).

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

The square root of 73872140 is about 8594.8903425233. The cubic root of 73872140 is about 419.5917044964.

Adding to 73872140 its reverse (4127837), we get a palindrome (77999977).

The spelling of 73872140 in words is "seventy-three million, eight hundred seventy-two thousand, one hundred forty".