2678178940 has 24 divisors (see below), whose sum is σ = 5708121552. Its totient is φ = 1055281920.

The previous prime is 2678178931. The next prime is 2678178967. The reversal of 2678178940 is 498718762.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 997981 + ... + 1000660.

It is an arithmetic number, because the mean of its divisors is an integer number (237838398).

Almost surely, 2^2678178940 is an apocalyptic number.

2678178940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2678178940 is an abundant number, since it is smaller than the sum of its proper divisors (3029942612).

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

2678178940 is a wasteful number, since it uses less digits than its factorization.

2678178940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998717 (or 1998715 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 52.

The square root of 2678178940 is about 51751.1250119261. The cubic root of 2678178940 is about 1388.7152250443.

The spelling of 2678178940 in words is "two billion, six hundred seventy-eight million, one hundred seventy-eight thousand, nine hundred forty".