73447878 has 64 divisors (see below), whose sum is σ = 176762880. Its totient is φ = 19891872.

The previous prime is 73447859. The next prime is 73447889. The reversal of 73447878 is 87874437.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134001 + ... + 134547.

It is an arithmetic number, because the mean of its divisors is an integer number (2761920).

Almost surely, 2^73447878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73447878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88381440).

73447878 is an abundant number, since it is smaller than the sum of its proper divisors (103315002).

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

73447878 is a wasteful number, since it uses less digits than its factorization.

73447878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721.

The product of its digits is 1053696, while the sum is 48.

The square root of 73447878 is about 8570.1737438631. The cubic root of 73447878 is about 418.7868963405.

The spelling of 73447878 in words is "seventy-three million, four hundred forty-seven thousand, eight hundred seventy-eight".