2538458778 has 32 divisors (see below), whose sum is σ = 5220452160. Its totient is φ = 822286080.

The previous prime is 2538458743. The next prime is 2538458807. The reversal of 2538458778 is 8778548352.

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, 189093 + ... + 202071.

It is an arithmetic number, because the mean of its divisors is an integer number (163139130).

Almost surely, 2^2538458778 is an apocalyptic number.

2538458778 is an abundant number, since it is smaller than the sum of its proper divisors (2681993382).

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

2538458778 is a wasteful number, since it uses less digits than its factorization.

2538458778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13902.

The product of its digits is 15052800, while the sum is 57.

The square root of 2538458778 is about 50383.1199708791. The cubic root of 2538458778 is about 1364.1329684214.

The spelling of 2538458778 in words is "two billion, five hundred thirty-eight million, four hundred fifty-eight thousand, seven hundred seventy-eight".