6139890 has 48 divisors (see below), whose sum is σ = 16906968. Its totient is φ = 1540608.

The previous prime is 6139883. The next prime is 6139897. The reversal of 6139890 is 989316.

It is an interprime number because it is at equal distance from previous prime (6139883) and next prime (6139897).

It can be written as a sum of positive squares in 4 ways, for example, as 6036849 + 103041 = 2457^2 + 321^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6139897) 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, 477 + ... + 3536.

Almost surely, 2^6139890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6139890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8453484).

6139890 is an abundant number, since it is smaller than the sum of its proper divisors (10767078).

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

6139890 is a wasteful number, since it uses less digits than its factorization.

6139890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043 (or 4040 counting only the distinct ones).

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

The square root of 6139890 is about 2477.8801423798. The cubic root of 6139890 is about 183.1134296331.

The spelling of 6139890 in words is "six million, one hundred thirty-nine thousand, eight hundred ninety".