1964226478 has 16 divisors (see below), whose sum is σ = 3121647984. Its totient is φ = 923751040.

The previous prime is 1964226449. The next prime is 1964226527. The reversal of 1964226478 is 8746224691.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 38013 + ... + 73303.

It is an arithmetic number, because the mean of its divisors is an integer number (195102999).

Almost surely, 2^1964226478 is an apocalyptic number.

1964226478 is a deficient number, since it is larger than the sum of its proper divisors (1157421506).

1964226478 is a wasteful number, since it uses less digits than its factorization.

1964226478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36947.

The product of its digits is 1161216, while the sum is 49.

The square root of 1964226478 is about 44319.5947409270. The cubic root of 1964226478 is about 1252.3638422885.

The spelling of 1964226478 in words is "one billion, nine hundred sixty-four million, two hundred twenty-six thousand, four hundred seventy-eight".