1240690338 has 32 divisors (see below), whose sum is σ = 2765992320. Its totient is φ = 412228080.

The previous prime is 1240690337. The next prime is 1240690343. The reversal of 1240690338 is 8330960421.

It is not an unprimeable number, because it can be changed into a prime (1240690331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20145 + ... + 53732.

It is an arithmetic number, because the mean of its divisors is an integer number (86437260).

Almost surely, 2^1240690338 is an apocalyptic number.

1240690338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1240690338 is an abundant number, since it is smaller than the sum of its proper divisors (1525301982).

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

1240690338 is a wasteful number, since it uses less digits than its factorization.

1240690338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74199 (or 74193 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1240690338 is about 35223.4345003437. The cubic root of 1240690338 is about 1074.5364038156.

The spelling of 1240690338 in words is "one billion, two hundred forty million, six hundred ninety thousand, three hundred thirty-eight".