1964287878 has 32 divisors (see below), whose sum is σ = 4491120384. Its totient is φ = 561060192.

The previous prime is 1964287867. The next prime is 1964287889. The reversal of 1964287878 is 8787824691.

It is an interprime number because it is at equal distance from previous prime (1964287867) and next prime (1964287889).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256501 + ... + 264047.

It is an arithmetic number, because the mean of its divisors is an integer number (140347512).

Almost surely, 2^1964287878 is an apocalyptic number.

1964287878 is an abundant number, since it is smaller than the sum of its proper divisors (2526832506).

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

1964287878 is a wasteful number, since it uses less digits than its factorization.

1964287878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13756.

The product of its digits is 10838016, while the sum is 60.

The square root of 1964287878 is about 44320.2874313784. The cubic root of 1964287878 is about 1252.3768914183.

The spelling of 1964287878 in words is "one billion, nine hundred sixty-four million, two hundred eighty-seven thousand, eight hundred seventy-eight".