1146677778 has 96 divisors (see below), whose sum is σ = 2788007040. Its totient is φ = 338480640.

The previous prime is 1146677773. The next prime is 1146677789. The reversal of 1146677778 is 8777766411.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1146677771) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 970348 + ... + 971528.

It is an arithmetic number, because the mean of its divisors is an integer number (29041740).

Almost surely, 2^1146677778 is an apocalyptic number.

1146677778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1146677778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1394003520).

1146677778 is an abundant number, since it is smaller than the sum of its proper divisors (1641329262).

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

1146677778 is a wasteful number, since it uses less digits than its factorization.

1146677778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392 (or 1389 counting only the distinct ones).

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

The square root of 1146677778 is about 33862.6309964244. The cubic root of 1146677778 is about 1046.6796939206.

The spelling of 1146677778 in words is "one billion, one hundred forty-six million, six hundred seventy-seven thousand, seven hundred seventy-eight".