1863402378 has 8 divisors (see below), whose sum is σ = 3726804768. Its totient is φ = 621134124.

The previous prime is 1863402353. The next prime is 1863402379. The reversal of 1863402378 is 8732043681.

It is a sphenic number, since it is the product of 3 distinct primes.

1863402378 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1863402379) 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, 155283526 + ... + 155283537.

It is an arithmetic number, because the mean of its divisors is an integer number (465850596).

Almost surely, 2^1863402378 is an apocalyptic number.

1863402378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1863402378 is a wasteful number, since it uses less digits than its factorization.

1863402378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310567068.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 1863402378 is about 43167.1446588722. The cubic root of 1863402378 is about 1230.5583597530.

The spelling of 1863402378 in words is "one billion, eight hundred sixty-three million, four hundred two thousand, three hundred seventy-eight".