383838390 has 48 divisors (see below), whose sum is σ = 1074750768. Its totient is φ = 94483008.

The previous prime is 383838383. The next prime is 383838401. The reversal of 383838390 is 93838383.

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

It is a Curzon number.

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, 162864 + ... + 165203.

It is an arithmetic number, because the mean of its divisors is an integer number (22390641).

Almost surely, 2^383838390 is an apocalyptic number.

383838390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

383838390 is an abundant number, since it is smaller than the sum of its proper divisors (690912378).

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

383838390 is a wasteful number, since it uses less digits than its factorization.

383838390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328093 (or 328090 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 383838390 is about 19591.7939454252. The cubic root of 383838390 is about 726.7462558600.

The spelling of 383838390 in words is "three hundred eighty-three million, eight hundred thirty-eight thousand, three hundred ninety".