1138740 has 24 divisors (see below), whose sum is σ = 3188640. Its totient is φ = 303648.

The previous prime is 1138733. The next prime is 1138741. The reversal of 1138740 is 478311.

It is a self number, because there is not a number n which added to its sum of digits gives 1138740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9430 + ... + 9549.

It is an arithmetic number, because the mean of its divisors is an integer number (132860).

2^1138740 is an apocalyptic number.

1138740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138740 is an abundant number, since it is smaller than the sum of its proper divisors (2049900).

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

1138740 is a wasteful number, since it uses less digits than its factorization.

1138740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18991 (or 18989 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1138740 is about 1067.1176130118. The cubic root of 1138740 is about 104.4258916126.

The spelling of 1138740 in words is "one million, one hundred thirty-eight thousand, seven hundred forty".