1366879920 has 160 divisors (see below), whose sum is σ = 4871688192. Its totient is φ = 310557696.

The previous prime is 1366879919. The next prime is 1366879973. The reversal of 1366879920 is 299786631.

1366879920 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 288289 + ... + 292991.

Almost surely, 2^1366879920 is an apocalyptic number.

1366879920 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 1366879920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2435844096).

1366879920 is an abundant number, since it is smaller than the sum of its proper divisors (3504808272).

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

1366879920 is a wasteful number, since it uses less digits than its factorization.

1366879920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4899 (or 4893 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 1366879920 is about 36971.3391696866. The cubic root of 1366879920 is about 1109.7967649987.

The spelling of 1366879920 in words is "one billion, three hundred sixty-six million, eight hundred seventy-nine thousand, nine hundred twenty".