71873040 has 40 divisors (see below), whose sum is σ = 222807168. Its totient is φ = 19166080.

The previous prime is 71873027. The next prime is 71873051. The reversal of 71873040 is 4037817.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 71872989 and 71873007.

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, 149496 + ... + 149975.

Almost surely, 2^71873040 is an apocalyptic number.

It is an amenable number.

71873040 is an abundant number, since it is smaller than the sum of its proper divisors (150934128).

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

71873040 is a wasteful number, since it uses less digits than its factorization.

71873040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299487 (or 299481 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 71873040 is about 8477.7968836249. The cubic root of 71873040 is about 415.7720953334.

The spelling of 71873040 in words is "seventy-one million, eight hundred seventy-three thousand, forty".