1240736388 has 12 divisors (see below), whose sum is σ = 2895051600. Its totient is φ = 413578792.

The previous prime is 1240736363. The next prime is 1240736389. The reversal of 1240736388 is 8836370421.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1240736389) 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, 51697338 + ... + 51697361.

It is an arithmetic number, because the mean of its divisors is an integer number (241254300).

Almost surely, 2^1240736388 is an apocalyptic number.

It is an amenable number.

1240736388 is an abundant number, since it is smaller than the sum of its proper divisors (1654315212).

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

1240736388 is a wasteful number, since it uses less digits than its factorization.

1240736388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103394706 (or 103394704 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 1240736388 is about 35224.0881784043. The cubic root of 1240736388 is about 1074.5496979706.

The spelling of 1240736388 in words is "one billion, two hundred forty million, seven hundred thirty-six thousand, three hundred eighty-eight".