1366790940 has 72 divisors (see below), whose sum is σ = 4154514000. Its totient is φ = 363723264.

The previous prime is 1366790923. The next prime is 1366790969. The reversal of 1366790940 is 490976631.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 82212 + ... + 97428.

Almost surely, 2^1366790940 is an apocalyptic number.

1366790940 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 1366790940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2077257000).

1366790940 is an abundant number, since it is smaller than the sum of its proper divisors (2787723060).

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

1366790940 is a wasteful number, since it uses less digits than its factorization.

1366790940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15731 (or 15726 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 1366790940 is about 36970.1357855229. The cubic root of 1366790940 is about 1109.7726829371.

The spelling of 1366790940 in words is "one billion, three hundred sixty-six million, seven hundred ninety thousand, nine hundred forty".