1278214860 has 96 divisors (see below), whose sum is σ = 3869171712. Its totient is φ = 313424640.

The previous prime is 1278214843. The next prime is 1278214879. The reversal of 1278214860 is 684128721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 208357 + ... + 214403.

It is an arithmetic number, because the mean of its divisors is an integer number (40303872).

Almost surely, 2^1278214860 is an apocalyptic number.

1278214860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278214860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1934585856).

1278214860 is an abundant number, since it is smaller than the sum of its proper divisors (2590956852).

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

1278214860 is a wasteful number, since it uses less digits than its factorization.

1278214860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6343 (or 6341 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 1278214860 is about 35752.1308455874. The cubic root of 1278214860 is about 1085.2620601961.

The spelling of 1278214860 in words is "one billion, two hundred seventy-eight million, two hundred fourteen thousand, eight hundred sixty".