1868438534 has 8 divisors (see below), whose sum is σ = 2924512560. Its totient is φ = 893601016.

The previous prime is 1868438489. The next prime is 1868438563. The reversal of 1868438534 is 4358348681.

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

It is a congruent number.

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, 20309069 + ... + 20309160.

It is an arithmetic number, because the mean of its divisors is an integer number (365564070).

Almost surely, 2^1868438534 is an apocalyptic number.

1868438534 is a deficient number, since it is larger than the sum of its proper divisors (1056074026).

1868438534 is a wasteful number, since it uses less digits than its factorization.

1868438534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40618254.

The product of its digits is 2211840, while the sum is 50.

The square root of 1868438534 is about 43225.4385055837. The cubic root of 1868438534 is about 1231.6659589924.

The spelling of 1868438534 in words is "one billion, eight hundred sixty-eight million, four hundred thirty-eight thousand, five hundred thirty-four".