1278970902 has 96 divisors (see below), whose sum is σ = 3212352000. Its totient is φ = 363683520.

The previous prime is 1278970829. The next prime is 1278970939. The reversal of 1278970902 is 2090798721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 408499 + ... + 411617.

It is an arithmetic number, because the mean of its divisors is an integer number (33462000).

Almost surely, 2^1278970902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278970902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1606176000).

1278970902 is an abundant number, since it is smaller than the sum of its proper divisors (1933381098).

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

1278970902 is a wasteful number, since it uses less digits than its factorization.

1278970902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3266 (or 3263 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 1278970902 is about 35762.7026663254. The cubic root of 1278970902 is about 1085.4759892744.

The spelling of 1278970902 in words is "one billion, two hundred seventy-eight million, nine hundred seventy thousand, nine hundred two".