38690730 has 128 divisors (see below), whose sum is σ = 113379840. Its totient is φ = 9331200.

The previous prime is 38690713. The next prime is 38690731. The reversal of 38690730 is 3709683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38690731) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 256155 + ... + 256305.

It is an arithmetic number, because the mean of its divisors is an integer number (885780).

Almost surely, 2^38690730 is an apocalyptic number.

38690730 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 38690730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56689920).

38690730 is an abundant number, since it is smaller than the sum of its proper divisors (74689110).

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

38690730 is a wasteful number, since it uses less digits than its factorization.

38690730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 38690730 is about 6220.1872962154. The cubic root of 38690730 is about 338.2223540711. Note that the first 3 decimals are identical.

The spelling of 38690730 in words is "thirty-eight million, six hundred ninety thousand, seven hundred thirty".