1816728434 has 8 divisors (see below), whose sum is σ = 2868518640. Its totient is φ = 860555556.

The previous prime is 1816728401. The next prime is 1816728449. The reversal of 1816728434 is 4348276181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23904284 + ... + 23904359.

It is an arithmetic number, because the mean of its divisors is an integer number (358564830).

Almost surely, 2^1816728434 is an apocalyptic number.

1816728434 is a deficient number, since it is larger than the sum of its proper divisors (1051790206).

1816728434 is a wasteful number, since it uses less digits than its factorization.

1816728434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47808664.

The product of its digits is 258048, while the sum is 44.

The square root of 1816728434 is about 42623.0974238147. The cubic root of 1816728434 is about 1220.1971449750.

The spelling of 1816728434 in words is "one billion, eight hundred sixteen million, seven hundred twenty-eight thousand, four hundred thirty-four".