378990729836 has 12 divisors (see below), whose sum is σ = 663238404360. Its totient is φ = 189494042880.

The previous prime is 378990729827. The next prime is 378990729839. The reversal of 378990729836 is 638927099873.

It is a self number, because there is not a number n which added to its sum of digits gives 378990729836.

It is not an unprimeable number, because it can be changed into a prime (378990729839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 615116 + ... + 1065996.

It is an arithmetic number, because the mean of its divisors is an integer number (55269867030).

Almost surely, 2^378990729836 is an apocalyptic number.

It is an amenable number.

378990729836 is a deficient number, since it is larger than the sum of its proper divisors (284247674524).

378990729836 is a wasteful number, since it uses less digits than its factorization.

378990729836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661024 (or 661022 counting only the distinct ones).

The product of its (nonzero) digits is 246903552, while the sum is 71.

The spelling of 378990729836 in words is "three hundred seventy-eight billion, nine hundred ninety million, seven hundred twenty-nine thousand, eight hundred thirty-six".