383399640 has 384 divisors, whose sum is σ = 1462406400. Its totient is φ = 86261760.

The previous prime is 383399591. The next prime is 383399671. The reversal of 383399640 is 46993383.

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 95 ways as a sum of consecutive naturals, for example, 4853121 + ... + 4853199.

It is an arithmetic number, because the mean of its divisors is an integer number (3808350).

Almost surely, 2^383399640 is an apocalyptic number.

383399640 is a gapful number since it is divisible by the number (30) 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 383399640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731203200).

383399640 is an abundant number, since it is smaller than the sum of its proper divisors (1079006760).

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

383399640 is a wasteful number, since it uses less digits than its factorization.

383399640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 383399640 is about 19580.5934537235. The cubic root of 383399640 is about 726.4692456241.

The spelling of 383399640 in words is "three hundred eighty-three million, three hundred ninety-nine thousand, six hundred forty".