38438730 has 96 divisors (see below), whose sum is σ = 111803328. Its totient is φ = 9081600.

The previous prime is 38438713. The next prime is 38438737. The reversal of 38438730 is 3783483.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38438737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40117 + ... + 41063.

It is an arithmetic number, because the mean of its divisors is an integer number (1164618).

Almost surely, 2^38438730 is an apocalyptic number.

38438730 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 38438730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55901664).

38438730 is an abundant number, since it is smaller than the sum of its proper divisors (73364598).

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

38438730 is a wasteful number, since it uses less digits than its factorization.

38438730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 1009 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 38438730 is about 6199.8975797992. The cubic root of 38438730 is about 337.4864521311.

The spelling of 38438730 in words is "thirty-eight million, four hundred thirty-eight thousand, seven hundred thirty".