1878505983 has 12 divisors (see below), whose sum is σ = 2719669680. Its totient is φ = 1249442496.

The previous prime is 1878505973. The next prime is 1878505991. The reversal of 1878505983 is 3895058781.

It is a de Polignac number, because none of the positive numbers 2^k-1878505983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1878505903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 237123 + ... + 244916.

It is an arithmetic number, because the mean of its divisors is an integer number (226639140).

Almost surely, 2^1878505983 is an apocalyptic number.

1878505983 is a deficient number, since it is larger than the sum of its proper divisors (841163697).

1878505983 is a wasteful number, since it uses less digits than its factorization.

1878505983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482478 (or 482475 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The square root of 1878505983 is about 43341.7348868270. The cubic root of 1878505983 is about 1233.8741361838.

The spelling of 1878505983 in words is "one billion, eight hundred seventy-eight million, five hundred five thousand, nine hundred eighty-three".