38021616 has 80 divisors (see below), whose sum is σ = 109873920. Its totient is φ = 12588480.

The previous prime is 38021611. The next prime is 38021651. The reversal of 38021616 is 61612083.

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

It is a self number, because there is not a number n which added to its sum of digits gives 38021616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38021611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122101 + ... + 122411.

It is an arithmetic number, because the mean of its divisors is an integer number (1373424).

Almost surely, 2^38021616 is an apocalyptic number.

38021616 is a gapful number since it is divisible by the number (36) 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 38021616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54936960).

38021616 is an abundant number, since it is smaller than the sum of its proper divisors (71852304).

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

38021616 is a wasteful number, since it uses less digits than its factorization.

38021616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 599 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 38021616 is about 6166.1670428233. The cubic root of 38021616 is about 336.2612763685.

Adding to 38021616 its reverse (61612083), we get a palindrome (99633699).

The spelling of 38021616 in words is "thirty-eight million, twenty-one thousand, six hundred sixteen".