38031930 has 128 divisors (see below), whose sum is σ = 107688960. Its totient is φ = 9657792.

The previous prime is 38031923. The next prime is 38031937. The reversal of 38031930 is 3913083.

It is an interprime number because it is at equal distance from previous prime (38031923) and next prime (38031937).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 38031894 and 38031903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38031937) 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, 809167 + ... + 809213.

It is an arithmetic number, because the mean of its divisors is an integer number (841320).

Almost surely, 2^38031930 is an apocalyptic number.

38031930 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 38031930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53844480).

38031930 is an abundant number, since it is smaller than the sum of its proper divisors (69657030).

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

38031930 is an equidigital number, since it uses as much as digits as its factorization.

38031930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 38031930 is about 6167.0033241437. The cubic root of 38031930 is about 336.2916791202.

The spelling of 38031930 in words is "thirty-eight million, thirty-one thousand, nine hundred thirty".