1371666240 has 336 divisors, whose sum is σ = 5677326720. Its totient is φ = 296939520.

The previous prime is 1371666223. The next prime is 1371666251. The reversal of 1371666240 is 426661731.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (336).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1371666195 and 1371666204.

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, 381250 + ... + 384830.

Almost surely, 2^1371666240 is an apocalyptic number.

1371666240 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 1371666240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2838663360).

1371666240 is an abundant number, since it is smaller than the sum of its proper divisors (4305660480).

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

1371666240 is a wasteful number, since it uses less digits than its factorization.

1371666240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630 (or 3617 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 1371666240 is about 37036.0127443546. The cubic root of 1371666240 is about 1111.0906251630.

The spelling of 1371666240 in words is "one billion, three hundred seventy-one million, six hundred sixty-six thousand, two hundred forty".