1090998388 has 6 divisors (see below), whose sum is σ = 1909247186. Its totient is φ = 545499192.

The previous prime is 1090998383. The next prime is 1090998427. The reversal of 1090998388 is 8838990901.

It can be written as a sum of positive squares in only one way, i.e., 672468624 + 418529764 = 25932^2 + 20458^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090998383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 136374795 + ... + 136374802.

Almost surely, 2^1090998388 is an apocalyptic number.

It is an amenable number.

1090998388 is a deficient number, since it is larger than the sum of its proper divisors (818248798).

1090998388 is a wasteful number, since it uses less digits than its factorization.

1090998388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272749601 (or 272749599 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 55.

The square root of 1090998388 is about 33030.2647279733. The cubic root of 1090998388 is about 1029.4565858192.

The spelling of 1090998388 in words is "one billion, ninety million, nine hundred ninety-eight thousand, three hundred eighty-eight".