81874074 has 32 divisors (see below), whose sum is σ = 174320640. Its totient is φ = 25546752.

The previous prime is 81874073. The next prime is 81874109. The reversal of 81874074 is 47047818.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (81874073) 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, 17607 + ... + 21765.

It is an arithmetic number, because the mean of its divisors is an integer number (5447520).

Almost surely, 2^81874074 is an apocalyptic number.

81874074 is an abundant number, since it is smaller than the sum of its proper divisors (92446566).

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

81874074 is a wasteful number, since it uses less digits than its factorization.

81874074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4374.

The product of its (nonzero) digits is 50176, while the sum is 39.

The square root of 81874074 is about 9048.4293664702. The cubic root of 81874074 is about 434.2256431039.

The spelling of 81874074 in words is "eighty-one million, eight hundred seventy-four thousand, seventy-four".