2312778 has 32 divisors (see below), whose sum is σ = 5040000. Its totient is φ = 703296.

The previous prime is 2312753. The next prime is 2312789. The reversal of 2312778 is 8772132.

It is a super-4 number, since 4×2312778⁴ (a number of 27 digits) contains 4444 as substring.

It is a d-powerful number, because it can be written as 2¹⁰ + 3¹¹ + 1 + 2²⁰ + 7³ + 7⁷ + 8⁶ .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11523 + ... + 11721.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

2^2312778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2312778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2520000).

2312778 is an abundant number, since it is smaller than the sum of its proper divisors (2727222).

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

2312778 is a wasteful number, since it uses less digits than its factorization.

2312778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366.

The product of its digits is 4704, while the sum is 30.

The square root of 2312778 is about 1520.7820356645. The cubic root of 2312778 is about 132.2446107083.

The spelling of 2312778 in words is "two million, three hundred twelve thousand, seven hundred seventy-eight".