1138690 has 16 divisors (see below), whose sum is σ = 2342592. Its totient is φ = 390384.

The previous prime is 1138681. The next prime is 1138703. The reversal of 1138690 is 968311.

1138690 = 188² + 189² + ... + 215².

It is a happy number.

It is a super-2 number, since 2×1138690² = 2593229832200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8064 + ... + 8203.

It is an arithmetic number, because the mean of its divisors is an integer number (146412).

2^1138690 is an apocalyptic number.

1138690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1138690 is an abundant number, since it is smaller than the sum of its proper divisors (1203902).

1138690 is a wasteful number, since it uses less digits than its factorization.

1138690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16281.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1138690 is about 1067.0941851589. The cubic root of 1138690 is about 104.4243632067.

It can be divided in two parts, 11386 and 90, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 1138690 in words is "one million, one hundred thirty-eight thousand, six hundred ninety".