1149391388 has 12 divisors (see below), whose sum is σ = 2014688760. Its totient is φ = 573766032.

The previous prime is 1149391379. The next prime is 1149391457. The reversal of 1149391388 is 8831939411.

It is a super-2 number, since 2×1149391388² = 2642201125617133088, 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 3 ways as a sum of consecutive naturals, for example, 229631 + ... + 234582.

It is an arithmetic number, because the mean of its divisors is an integer number (167890730).

Almost surely, 2^1149391388 is an apocalyptic number.

It is an amenable number.

1149391388 is a deficient number, since it is larger than the sum of its proper divisors (865297372).

1149391388 is a wasteful number, since it uses less digits than its factorization.

1149391388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464836 (or 464834 counting only the distinct ones).

The product of its digits is 186624, while the sum is 47.

The square root of 1149391388 is about 33902.6752336744. The cubic root of 1149391388 is about 1047.5046984028.

The spelling of 1149391388 in words is "one billion, one hundred forty-nine million, three hundred ninety-one thousand, three hundred eighty-eight".