71984634 has 16 divisors (see below), whose sum is σ = 144056640. Its totient is φ = 23980320.

The previous prime is 71984621. The next prime is 71984659. The reversal of 71984634 is 43648917.

It is a super-2 number, since 2×71984634² = 10363575064227912, which contains 22 as substring.

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, 12747 + ... + 17505.

It is an arithmetic number, because the mean of its divisors is an integer number (9003540).

Almost surely, 2^71984634 is an apocalyptic number.

71984634 is an abundant number, since it is smaller than the sum of its proper divisors (72072006).

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

71984634 is a wasteful number, since it uses less digits than its factorization.

71984634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7285.

The product of its digits is 145152, while the sum is 42.

The square root of 71984634 is about 8484.3758756906. The cubic root of 71984634 is about 415.9871675344.

The spelling of 71984634 in words is "seventy-one million, nine hundred eighty-four thousand, six hundred thirty-four".