1011863778 has 8 divisors (see below), whose sum is σ = 2023727568. Its totient is φ = 337287924.

The previous prime is 1011863773. The next prime is 1011863789. The reversal of 1011863778 is 8773681101.

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

1011863778 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1011863773) 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, 84321976 + ... + 84321987.

It is an arithmetic number, because the mean of its divisors is an integer number (252965946).

Almost surely, 2^1011863778 is an apocalyptic number.

1011863778 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.

1011863778 is a wasteful number, since it uses less digits than its factorization.

1011863778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168643968.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 1011863778 is about 31809.8063181780. The cubic root of 1011863778 is about 1003.9390561305.

The spelling of 1011863778 in words is "one billion, eleven million, eight hundred sixty-three thousand, seven hundred seventy-eight".