1278840054 has 8 divisors (see below), whose sum is σ = 2557680120. Its totient is φ = 426280016.

The previous prime is 1278840041. The next prime is 1278840091. The reversal of 1278840054 is 4500488721.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

1278840054 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1278839994 and 1278840021.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106569999 + ... + 106570010.

It is an arithmetic number, because the mean of its divisors is an integer number (319710015).

Almost surely, 2^1278840054 is an apocalyptic number.

1278840054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1278840054 is a wasteful number, since it uses less digits than its factorization.

1278840054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213140014.

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 1278840054 is about 35760.8732275933. The cubic root of 1278840054 is about 1085.4389706563.

The spelling of 1278840054 in words is "one billion, two hundred seventy-eight million, eight hundred forty thousand, fifty-four".