1044777978 has 24 divisors (see below), whose sum is σ = 2264476500. Its totient is φ = 348137664.

The previous prime is 1044777961. The next prime is 1044777989. The reversal of 1044777978 is 8797774401.

It can be written as a sum of positive squares in 2 ways, for example, as 633377889 + 411400089 = 25167^2 + 20283^2 .

It is a super-2 number, since 2×1044777978² = 2183122046627536968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 53668 + ... + 70496.

Almost surely, 2^1044777978 is an apocalyptic number.

1044777978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1044777978 is an abundant number, since it is smaller than the sum of its proper divisors (1219698522).

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

1044777978 is a wasteful number, since it uses less digits than its factorization.

1044777978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20286 (or 20283 counting only the distinct ones).

The product of its (nonzero) digits is 2765952, while the sum is 54.

The square root of 1044777978 is about 32323.0255081420. The cubic root of 1044777978 is about 1014.7085893673.

The spelling of 1044777978 in words is "one billion, forty-four million, seven hundred seventy-seven thousand, nine hundred seventy-eight".