1209878768 has 20 divisors (see below), whose sum is σ = 2679017520. Its totient is φ = 518519424.

The previous prime is 1209878731. The next prime is 1209878773. The reversal of 1209878768 is 8678789021.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 5401133 + ... + 5401356.

It is an arithmetic number, because the mean of its divisors is an integer number (133950876).

Almost surely, 2^1209878768 is an apocalyptic number.

It is an amenable number.

1209878768 is an abundant number, since it is smaller than the sum of its proper divisors (1469138752).

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

1209878768 is a wasteful number, since it uses less digits than its factorization.

1209878768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10802504 (or 10802498 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 56.

The square root of 1209878768 is about 34783.3116307231. The cubic root of 1209878768 is about 1065.5666473988.

The spelling of 1209878768 in words is "one billion, two hundred nine million, eight hundred seventy-eight thousand, seven hundred sixty-eight".