6138990 has 160 divisors (see below), whose sum is σ = 19758816. Its totient is φ = 1347840.

The previous prime is 6138983. The next prime is 6138991. The reversal of 6138990 is 998316.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6138991) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 115804 + ... + 115856.

Almost surely, 2^6138990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6138990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9879408).

6138990 is an abundant number, since it is smaller than the sum of its proper divisors (13619826).

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

6138990 is a wasteful number, since it uses less digits than its factorization.

6138990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96 (or 87 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 6138990 is about 2477.6985288772. The cubic root of 6138990 is about 183.1044821254.

The spelling of 6138990 in words is "six million, one hundred thirty-eight thousand, nine hundred ninety".