38998638 has 32 divisors (see below), whose sum is σ = 99045120. Its totient is φ = 11142360.

The previous prime is 38998637. The next prime is 38998669. The reversal of 38998638 is 83689983.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38998633) 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, 51208 + ... + 51963.

It is an arithmetic number, because the mean of its divisors is an integer number (3095160).

Almost surely, 2^38998638 is an apocalyptic number.

38998638 is an abundant number, since it is smaller than the sum of its proper divisors (60046482).

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

38998638 is a wasteful number, since it uses less digits than its factorization.

38998638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103189 (or 103183 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 38998638 is about 6244.8889501736. Note that the first 3 decimals coincide. The cubic root of 38998638 is about 339.1171965375.

The spelling of 38998638 in words is "thirty-eight million, nine hundred ninety-eight thousand, six hundred thirty-eight".