1138536 has 80 divisors (see below), whose sum is σ = 3659040. Its totient is φ = 324000.

The previous prime is 1138519. The next prime is 1138547. The reversal of 1138536 is 6358311.

1138536 = T₁₇₃ + T₁₇₄ + ... + T₂₂₈.

1138536 = 40² + 41² + ... + 151².

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

It is an Ulam number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4411 + ... + 4661.

It is an arithmetic number, because the mean of its divisors is an integer number (45738).

2^1138536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1138536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1829520).

1138536 is an abundant number, since it is smaller than the sum of its proper divisors (2520504).

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

1138536 is a wasteful number, since it uses less digits than its factorization.

1138536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276 (or 263 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 1138536 is about 1067.0220241401. The cubic root of 1138536 is about 104.4196554352.

It can be divided in two parts, 113 and 8536, that added together give a square (8649 = 93²).

The spelling of 1138536 in words is "one million, one hundred thirty-eight thousand, five hundred thirty-six".