1278958120 has 32 divisors (see below), whose sum is σ = 3139261920. Its totient is φ = 465075520.

The previous prime is 1278958117. The next prime is 1278958151. The reversal of 1278958120 is 218598721.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1452922 + ... + 1453801.

It is an arithmetic number, because the mean of its divisors is an integer number (98101935).

Almost surely, 2^1278958120 is an apocalyptic number.

1278958120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1278958120 is an abundant number, since it is smaller than the sum of its proper divisors (1860303800).

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

1278958120 is a wasteful number, since it uses less digits than its factorization.

1278958120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2906745 (or 2906741 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 43.

The square root of 1278958120 is about 35762.5239601458. The cubic root of 1278958120 is about 1085.4723731899.

The spelling of 1278958120 in words is "one billion, two hundred seventy-eight million, nine hundred fifty-eight thousand, one hundred twenty".