1089657944 has 8 divisors (see below), whose sum is σ = 2043108660. Its totient is φ = 544828968.

The previous prime is 1089657941. The next prime is 1089657953. The reversal of 1089657944 is 4497569801.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089657941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68103614 + ... + 68103629.

Almost surely, 2^1089657944 is an apocalyptic number.

It is an amenable number.

1089657944 is a deficient number, since it is larger than the sum of its proper divisors (953450716).

1089657944 is a wasteful number, since it uses less digits than its factorization.

1089657944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136207249 (or 136207245 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 1089657944 is about 33009.9673432132. The cubic root of 1089657944 is about 1029.0348026005.

The spelling of 1089657944 in words is "one billion, eighty-nine million, six hundred fifty-seven thousand, nine hundred forty-four".