1138860 has 120 divisors (see below), whose sum is σ = 3862320. Its totient is φ = 279936.

The previous prime is 1138853. The next prime is 1138867. The reversal of 1138860 is 688311.

1138860 = 59² + 60² + ... + 153².

It is an interprime number because it is at equal distance from previous prime (1138853) and next prime (1138867).

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

It is not an unprimeable number, because it can be changed into a prime (1138867) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30762 + ... + 30798.

It is an arithmetic number, because the mean of its divisors is an integer number (32186).

2^1138860 is an apocalyptic number.

1138860 is a gapful number since it is divisible by the number (10) 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 1138860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1931160).

1138860 is an abundant number, since it is smaller than the sum of its proper divisors (2723460).

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

1138860 is a wasteful number, since it uses less digits than its factorization.

1138860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1138860 is about 1067.1738377603. The cubic root of 1138860 is about 104.4295596044.

The spelling of 1138860 in words is "one million, one hundred thirty-eight thousand, eight hundred sixty".