71872407 has 16 divisors (see below), whose sum is σ = 107424480. Its totient is φ = 47488896.

The previous prime is 71872403. The next prime is 71872417. The reversal of 71872407 is 70427817.

It is not a de Polignac number, because 71872407 - 2² = 71872403 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71872403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8728 + ... + 14829.

It is an arithmetic number, because the mean of its divisors is an integer number (6714030).

Almost surely, 2^71872407 is an apocalyptic number.

71872407 is a deficient number, since it is larger than the sum of its proper divisors (35552073).

71872407 is a wasteful number, since it uses less digits than its factorization.

71872407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23679 (or 23673 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 71872407 is about 8477.7595507304. The cubic root of 71872407 is about 415.7708747343.

The spelling of 71872407 in words is "seventy-one million, eight hundred seventy-two thousand, four hundred seven".