38440830 has 64 divisors (see below), whose sum is σ = 95385600. Its totient is φ = 9909504.

The previous prime is 38440823. The next prime is 38440849. The reversal of 38440830 is 3804483.

It is a super-2 number, since 2×38440830² = 2955394822177800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193071 + ... + 193269.

It is an arithmetic number, because the mean of its divisors is an integer number (1490400).

Almost surely, 2^38440830 is an apocalyptic number.

38440830 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 38440830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47692800).

38440830 is an abundant number, since it is smaller than the sum of its proper divisors (56944770).

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

38440830 is a wasteful number, since it uses less digits than its factorization.

38440830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 38440830 is about 6200.0669351226. The cubic root of 38440830 is about 337.4925979172.

It can be divided in two parts, 384 and 40830, that added together give a palindrome (41214).

The spelling of 38440830 in words is "thirty-eight million, four hundred forty thousand, eight hundred thirty".