38512140 has 72 divisors (see below), whose sum is σ = 114601872. Its totient is φ = 9661440.

The previous prime is 38512109. The next prime is 38512147. The reversal of 38512140 is 4121583.

It is a self number, because there is not a number n which added to its sum of digits gives 38512140.

It is not an unprimeable number, because it can be changed into a prime (38512147) 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 23 ways as a sum of consecutive naturals, for example, 16230 + ... + 18450.

Almost surely, 2^38512140 is an apocalyptic number.

38512140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38512140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57300936).

38512140 is an abundant number, since it is smaller than the sum of its proper divisors (76089732).

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

38512140 is a wasteful number, since it uses less digits than its factorization.

38512140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2267 (or 2248 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 38512140 is about 6205.8150149678. The cubic root of 38512140 is about 337.7011585442.

The spelling of 38512140 in words is "thirty-eight million, five hundred twelve thousand, one hundred forty".