2878143905 has 32 divisors (see below), whose sum is σ = 4266114048. Its totient is φ = 1815206400.

The previous prime is 2878143859. The next prime is 2878143913. The reversal of 2878143905 is 5093418782.

It is a happy number.

It is not a de Polignac number, because 2878143905 - 2²⁰ = 2877095329 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2878143905.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116600 + ... + 139110.

It is an arithmetic number, because the mean of its divisors is an integer number (133316064).

Almost surely, 2^2878143905 is an apocalyptic number.

It is an amenable number.

2878143905 is a deficient number, since it is larger than the sum of its proper divisors (1387970143).

2878143905 is a wasteful number, since it uses less digits than its factorization.

2878143905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22817.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 2878143905 is about 53648.3355287002. The cubic root of 2878143905 is about 1422.4516111177.

It can be divided in two parts, 2878 and 143905, that multiplied together give a triangular number (414158590 = T₂₈₇₈₀).

The spelling of 2878143905 in words is "two billion, eight hundred seventy-eight million, one hundred forty-three thousand, nine hundred five".