71855814 has 16 divisors (see below), whose sum is σ = 144142128. Its totient is φ = 23880192.

The previous prime is 71855803. The next prime is 71855831. The reversal of 71855814 is 41855817.

It is a congruent number.

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, 15747 + ... + 19790.

It is an arithmetic number, because the mean of its divisors is an integer number (9008883).

Almost surely, 2^71855814 is an apocalyptic number.

71855814 is an abundant number, since it is smaller than the sum of its proper divisors (72286314).

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

71855814 is a wasteful number, since it uses less digits than its factorization.

71855814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35879.

The product of its digits is 44800, while the sum is 39.

The square root of 71855814 is about 8476.7808748369. The cubic root of 71855814 is about 415.7388762832.

The spelling of 71855814 in words is "seventy-one million, eight hundred fifty-five thousand, eight hundred fourteen".