1278290160 has 200 divisors, whose sum is σ = 5074112736. Its totient is φ = 292170240.

The previous prime is 1278290149. The next prime is 1278290183. The reversal of 1278290160 is 610928721.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31270 + ... + 59450.

Almost surely, 2^1278290160 is an apocalyptic number.

1278290160 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 1278290160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2537056368).

1278290160 is an abundant number, since it is smaller than the sum of its proper divisors (3795822576).

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

1278290160 is a wasteful number, since it uses less digits than its factorization.

1278290160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28213 (or 28198 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1278290160 is about 35753.1839141635. The cubic root of 1278290160 is about 1085.2833708096.

The spelling of 1278290160 in words is "one billion, two hundred seventy-eight million, two hundred ninety thousand, one hundred sixty".