1240608388 has 12 divisors (see below), whose sum is σ = 2298774492. Its totient is φ = 583815680.

The previous prime is 1240608377. The next prime is 1240608389. The reversal of 1240608388 is 8838060421.

It can be written as a sum of positive squares in 2 ways, for example, as 583608964 + 656999424 = 24158^2 + 25632^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1240608388.

It is not an unprimeable number, because it can be changed into a prime (1240608389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9122053 + ... + 9122188.

It is an arithmetic number, because the mean of its divisors is an integer number (191564541).

Almost surely, 2^1240608388 is an apocalyptic number.

It is an amenable number.

1240608388 is a deficient number, since it is larger than the sum of its proper divisors (1058166104).

1240608388 is a wasteful number, since it uses less digits than its factorization.

1240608388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18244262 (or 18244260 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 1240608388 is about 35222.2711930960. The cubic root of 1240608388 is about 1074.5127448910.

It can be divided in two parts, 1240608 and 388, that added together give a square (1240996 = 1114²).

The spelling of 1240608388 in words is "one billion, two hundred forty million, six hundred eight thousand, three hundred eighty-eight".