38965140 has 72 divisors (see below), whose sum is σ = 122024448. Its totient is φ = 10054080.

The previous prime is 38965133. The next prime is 38965141. The reversal of 38965140 is 4156983.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 38965095 and 38965104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38965141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2089 + ... + 9071.

It is an arithmetic number, because the mean of its divisors is an integer number (1694784).

Almost surely, 2^38965140 is an apocalyptic number.

38965140 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 38965140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61012224).

38965140 is an abundant number, since it is smaller than the sum of its proper divisors (83059308).

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

38965140 is a wasteful number, since it uses less digits than its factorization.

38965140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7029 (or 7024 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 38965140 is about 6242.2063407100. The cubic root of 38965140 is about 339.0200734713.

The spelling of 38965140 in words is "thirty-eight million, nine hundred sixty-five thousand, one hundred forty".