1238740 has 24 divisors (see below), whose sum is σ = 2622312. Its totient is φ = 491520.

The previous prime is 1238719. The next prime is 1238747. The reversal of 1238740 is 478321.

It can be written as a sum of positive squares in 4 ways, for example, as 617796 + 620944 = 786^2 + 788^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238747) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4692 + ... + 4948.

It is an arithmetic number, because the mean of its divisors is an integer number (109263).

2^1238740 is an apocalyptic number.

1238740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1238740 is an abundant number, since it is smaller than the sum of its proper divisors (1383572).

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

1238740 is a wasteful number, since it uses less digits than its factorization.

1238740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507 (or 505 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 1238740 is about 1112.9869720711. The cubic root of 1238740 is about 107.3973059304.

The spelling of 1238740 in words is "one million, two hundred thirty-eight thousand, seven hundred forty".