71685474 has 16 divisors (see below), whose sum is σ = 163852608. Its totient is φ = 20481552.

The previous prime is 71685443. The next prime is 71685487. The reversal of 71685474 is 47458617.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1706797 = 71685474 / (7 + 1 + 6 + 8 + 5 + 4 + 7 + 4).

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, 853357 + ... + 853440.

It is an arithmetic number, because the mean of its divisors is an integer number (10240788).

Almost surely, 2^71685474 is an apocalyptic number.

71685474 is an abundant number, since it is smaller than the sum of its proper divisors (92167134).

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

71685474 is a wasteful number, since it uses less digits than its factorization.

71685474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706809.

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

The square root of 71685474 is about 8466.7274669733. The cubic root of 71685474 is about 415.4101021768.

The spelling of 71685474 in words is "seventy-one million, six hundred eighty-five thousand, four hundred seventy-four".