1964778 has 8 divisors (see below), whose sum is σ = 3929568. Its totient is φ = 654924.

The previous prime is 1964773. The next prime is 1964789. The reversal of 1964778 is 8774691.

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

1964778 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1964773) 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, 163726 + ... + 163737.

It is an arithmetic number, because the mean of its divisors is an integer number (491196).

2^1964778 is an apocalyptic number.

1964778 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.

1964778 is a wasteful number, since it uses less digits than its factorization.

1964778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327468.

The product of its digits is 84672, while the sum is 42.

The square root of 1964778 is about 1401.7053898733. The cubic root of 1964778 is about 125.2481045605.

The spelling of 1964778 in words is "one million, nine hundred sixty-four thousand, seven hundred seventy-eight".