38213538 has 64 divisors (see below), whose sum is σ = 86704128. Its totient is φ = 11128320.

The previous prime is 38213537. The next prime is 38213611. The reversal of 38213538 is 83531283.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 38213499 and 38213508.

It is not an unprimeable number, because it can be changed into a prime (38213531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300831 + ... + 300957.

It is an arithmetic number, because the mean of its divisors is an integer number (1354752).

Almost surely, 2^38213538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38213538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43352064).

38213538 is an abundant number, since it is smaller than the sum of its proper divisors (48490590).

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

38213538 is a wasteful number, since it uses less digits than its factorization.

38213538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287.

The product of its digits is 17280, while the sum is 33.

The square root of 38213538 is about 6181.7099576088. The cubic root of 38213538 is about 336.8261099270.

The spelling of 38213538 in words is "thirty-eight million, two hundred thirteen thousand, five hundred thirty-eight".