1489953644 has 24 divisors (see below), whose sum is σ = 2762287920. Its totient is φ = 700775936.

The previous prime is 1489953643. The next prime is 1489953671. The reversal of 1489953644 is 4463599841.

It is a super-2 number, since 2×1489953644² = 4439923722537757472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1489953643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151427 + ... + 160965.

It is an arithmetic number, because the mean of its divisors is an integer number (115095330).

Almost surely, 2^1489953644 is an apocalyptic number.

It is an amenable number.

1489953644 is a deficient number, since it is larger than the sum of its proper divisors (1272334276).

1489953644 is a wasteful number, since it uses less digits than its factorization.

1489953644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11857 (or 11855 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 53.

The square root of 1489953644 is about 38599.9176683060. The cubic root of 1489953644 is about 1142.1529142774.

The spelling of 1489953644 in words is "one billion, four hundred eighty-nine million, nine hundred fifty-three thousand, six hundred forty-four".