73878540 has 24 divisors (see below), whose sum is σ = 206860080. Its totient is φ = 19700928.

The previous prime is 73878533. The next prime is 73878547. The reversal of 73878540 is 4587837.

It is an interprime number because it is at equal distance from previous prime (73878533) and next prime (73878547).

It is a junction number, because it is equal to n+sod(n) for n = 73878492 and 73878501.

It is not an unprimeable number, because it can be changed into a prime (73878547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615595 + ... + 615714.

It is an arithmetic number, because the mean of its divisors is an integer number (8619170).

Almost surely, 2^73878540 is an apocalyptic number.

It is an amenable number.

73878540 is an abundant number, since it is smaller than the sum of its proper divisors (132981540).

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

73878540 is a wasteful number, since it uses less digits than its factorization.

73878540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231321 (or 1231319 counting only the distinct ones).

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 73878540 is about 8595.2626486920. The cubic root of 73878540 is about 419.6038214206.

The spelling of 73878540 in words is "seventy-three million, eight hundred seventy-eight thousand, five hundred forty".