1408723989 has 16 divisors (see below), whose sum is σ = 2035040832. Its totient is φ = 863347968.

The previous prime is 1408723969. The next prime is 1408724021. The reversal of 1408723989 is 9893278041.

It is not a de Polignac number, because 1408723989 - 2²⁰ = 1407675413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1408723969) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318994 + ... + 323379.

It is an arithmetic number, because the mean of its divisors is an integer number (127190052).

Almost surely, 2^1408723989 is an apocalyptic number.

It is an amenable number.

1408723989 is a deficient number, since it is larger than the sum of its proper divisors (626316843).

1408723989 is a wasteful number, since it uses less digits than its factorization.

1408723989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642436.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 1408723989 is about 37532.9720246079. The cubic root of 1408723989 is about 1121.0078059406.

The spelling of 1408723989 in words is "one billion, four hundred eight million, seven hundred twenty-three thousand, nine hundred eighty-nine".