1382209920 has 640 divisors, whose sum is σ = 6095960640. Its totient is φ = 290635776.

The previous prime is 1382209883. The next prime is 1382209921. The reversal of 1382209920 is 299022831.

It is a tau number, because it is divible by the number of its divisors (640).

It is a super-3 number, since 3×1382209920³ (a number of 28 digits) contains 333 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1382209921) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4717294 + ... + 4717586.

Almost surely, 2^1382209920 is an apocalyptic number.

1382209920 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 1382209920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3047980320).

1382209920 is an abundant number, since it is smaller than the sum of its proper divisors (4713750720).

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

1382209920 is a wasteful number, since it uses less digits than its factorization.

1382209920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1382209920 is about 37178.0838667084. The cubic root of 1382209920 is about 1113.9302602496.

The spelling of 1382209920 in words is "one billion, three hundred eighty-two million, two hundred nine thousand, nine hundred twenty".