1158783940 has 12 divisors (see below), whose sum is σ = 2433446316. Its totient is φ = 463513568.

The previous prime is 1158783917. The next prime is 1158783973. The reversal of 1158783940 is 493878511.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 779079744 + 379704196 = 27912^2 + 19486^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28969579 + ... + 28969618.

It is an arithmetic number, because the mean of its divisors is an integer number (202787193).

Almost surely, 2^1158783940 is an apocalyptic number.

1158783940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1158783940 is an abundant number, since it is smaller than the sum of its proper divisors (1274662376).

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

1158783940 is a wasteful number, since it uses less digits than its factorization.

1158783940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57939206 (or 57939204 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 1158783940 is about 34040.9156751107. The cubic root of 1158783940 is about 1050.3502807144.

The spelling of 1158783940 in words is "one billion, one hundred fifty-eight million, seven hundred eighty-three thousand, nine hundred forty".