1369879740 has 72 divisors (see below), whose sum is σ = 4179415968. Its totient is φ = 363181440.

The previous prime is 1369879733. The next prime is 1369879769. The reversal of 1369879740 is 479789631.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9145 + ... + 53135.

It is an arithmetic number, because the mean of its divisors is an integer number (58047444).

Almost surely, 2^1369879740 is an apocalyptic number.

1369879740 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 1369879740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2089707984).

1369879740 is an abundant number, since it is smaller than the sum of its proper divisors (2809536228).

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

1369879740 is a wasteful number, since it uses less digits than its factorization.

1369879740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44179 (or 44174 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The square root of 1369879740 is about 37011.8864690791. The cubic root of 1369879740 is about 1110.6080428052.

The spelling of 1369879740 in words is "one billion, three hundred sixty-nine million, eight hundred seventy-nine thousand, seven hundred forty".