1240789158 has 32 divisors (see below), whose sum is σ = 3151211520. Its totient is φ = 354511080.

The previous prime is 1240789127. The next prime is 1240789169. The reversal of 1240789158 is 8519870421.

1240789158 is a `hidden beast` number, since 12 + 407 + 89 + 158 = 666.

1240789158 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1240789158² = 3079115469220697928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1640878 + ... + 1641633.

It is an arithmetic number, because the mean of its divisors is an integer number (98475360).

Almost surely, 2^1240789158 is an apocalyptic number.

1240789158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1240789158 is an abundant number, since it is smaller than the sum of its proper divisors (1910422362).

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

1240789158 is a wasteful number, since it uses less digits than its factorization.

1240789158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3282529 (or 3282523 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1240789158 is about 35224.8372317034. The cubic root of 1240789158 is about 1074.5649317152.

The spelling of 1240789158 in words is "one billion, two hundred forty million, seven hundred eighty-nine thousand, one hundred fifty-eight".