1854642538 has 32 divisors (see below), whose sum is σ = 3274992000. Its totient is φ = 771073344.

The previous prime is 1854642533. The next prime is 1854642593. The reversal of 1854642538 is 8352464581.

It is not an unprimeable number, because it can be changed into a prime (1854642533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175653 + ... + 185911.

It is an arithmetic number, because the mean of its divisors is an integer number (102343500).

Almost surely, 2^1854642538 is an apocalyptic number.

1854642538 is a deficient number, since it is larger than the sum of its proper divisors (1420349462).

1854642538 is a wasteful number, since it uses less digits than its factorization.

1854642538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10654.

The product of its digits is 921600, while the sum is 46.

The square root of 1854642538 is about 43065.5609274975. The cubic root of 1854642538 is about 1228.6270484838.

The spelling of 1854642538 in words is "one billion, eight hundred fifty-four million, six hundred forty-two thousand, five hundred thirty-eight".