1240188774 has 36 divisors (see below), whose sum is σ = 2728452972. Its totient is φ = 375527240.

The previous prime is 1240188749. The next prime is 1240188779. The reversal of 1240188774 is 4778810421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240188779) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 948229 + ... + 949535.

Almost surely, 2^1240188774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1240188774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1364226486).

1240188774 is an abundant number, since it is smaller than the sum of its proper divisors (1488264198).

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

1240188774 is an equidigital number, since it uses as much as digits as its factorization.

1240188774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641 (or 1323 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 42.

The square root of 1240188774 is about 35216.3140319938. The cubic root of 1240188774 is about 1074.3915862082.

The spelling of 1240188774 in words is "one billion, two hundred forty million, one hundred eighty-eight thousand, seven hundred seventy-four".