1383868440 has 48 divisors (see below), whose sum is σ = 4497573600. Its totient is φ = 369031488.

The previous prime is 1383868351. The next prime is 1383868457. The reversal of 1383868440 is 448683831.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 11 ways as a sum of consecutive naturals, for example, 1921680 + ... + 1922399.

It is an arithmetic number, because the mean of its divisors is an integer number (93699450).

Almost surely, 2^1383868440 is an apocalyptic number.

1383868440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1383868440 is an abundant number, since it is smaller than the sum of its proper divisors (3113705160).

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

1383868440 is a wasteful number, since it uses less digits than its factorization.

1383868440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3844096 (or 3844089 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 1383868440 is about 37200.3822561005. The cubic root of 1383868440 is about 1114.3756188378.

The spelling of 1383868440 in words is "one billion, three hundred eighty-three million, eight hundred sixty-eight thousand, four hundred forty".