378204861 has 32 divisors (see below), whose sum is σ = 547747200. Its totient is φ = 231310080.

The previous prime is 378204793. The next prime is 378204881. The reversal of 378204861 is 168402873.

It is not a de Polignac number, because 378204861 - 2²⁵ = 344650429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378204881) 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 31 ways as a sum of consecutive naturals, for example, 820171 + ... + 820631.

It is an arithmetic number, because the mean of its divisors is an integer number (17117100).

Almost surely, 2^378204861 is an apocalyptic number.

It is an amenable number.

378204861 is a deficient number, since it is larger than the sum of its proper divisors (169542339).

378204861 is a wasteful number, since it uses less digits than its factorization.

378204861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909.

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 378204861 is about 19447.4898380228. The cubic root of 378204861 is about 723.1732758094.

The spelling of 378204861 in words is "three hundred seventy-eight million, two hundred four thousand, eight hundred sixty-one".