1978200475 has 12 divisors (see below), whose sum is σ = 2456215560. Its totient is φ = 1580465600.

The previous prime is 1978200467. The next prime is 1978200547. The reversal of 1978200475 is 5740028791.

It is not a de Polignac number, because 1978200475 - 2³ = 1978200467 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32965 + ... + 71014.

It is an arithmetic number, because the mean of its divisors is an integer number (204684630).

Almost surely, 2^1978200475 is an apocalyptic number.

1978200475 is a deficient number, since it is larger than the sum of its proper divisors (478015085).

1978200475 is a wasteful number, since it uses less digits than its factorization.

1978200475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104750 (or 104745 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 1978200475 is about 44476.9656676352. The cubic root of 1978200475 is about 1255.3267034084.

The spelling of 1978200475 in words is "one billion, nine hundred seventy-eight million, two hundred thousand, four hundred seventy-five".