2126400878 has 32 divisors (see below), whose sum is σ = 3773374464. Its totient is φ = 879675552.

The previous prime is 2126400877. The next prime is 2126400883. The reversal of 2126400878 is 8780046212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126400877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49625 + ... + 81947.

It is an arithmetic number, because the mean of its divisors is an integer number (117917952).

Almost surely, 2^2126400878 is an apocalyptic number.

2126400878 is a deficient number, since it is larger than the sum of its proper divisors (1646973586).

2126400878 is a wasteful number, since it uses less digits than its factorization.

2126400878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32496.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 2126400878 is about 46112.9144383653. The cubic root of 2126400878 is about 1285.9232471383.

The spelling of 2126400878 in words is "two billion, one hundred twenty-six million, four hundred thousand, eight hundred seventy-eight".