2912778 has 48 divisors (see below), whose sum is σ = 7053696. Its totient is φ = 861120.

The previous prime is 2912761. The next prime is 2912779. The reversal of 2912778 is 8772192.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2912779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9150 + ... + 9462.

It is an arithmetic number, because the mean of its divisors is an integer number (146952).

2^2912778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2912778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3526848).

2912778 is an abundant number, since it is smaller than the sum of its proper divisors (4140918).

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

2912778 is a wasteful number, since it uses less digits than its factorization.

2912778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 376 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 2912778 is about 1706.6862629083. The cubic root of 2912778 is about 142.8134558796.

The spelling of 2912778 in words is "two million, nine hundred twelve thousand, seven hundred seventy-eight".