144428904 has 24 divisors (see below), whose sum is σ = 391161810. Its totient is φ = 48142944.

The previous prime is 144428887. The next prime is 144428927. The reversal of 144428904 is 409824441.

144428904 is a `hidden beast` number, since 144 + 428 + 90 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 80460900 + 63968004 = 8970^2 + 7998^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1002907 + ... + 1003050.

Almost surely, 2^144428904 is an apocalyptic number.

It is an amenable number.

144428904 is an abundant number, since it is smaller than the sum of its proper divisors (246732906).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

144428904 is a wasteful number, since it uses less digits than its factorization.

144428904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005969 (or 2005962 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 144428904 is about 12017.8577125875. The cubic root of 144428904 is about 524.6681549155.

The spelling of 144428904 in words is "one hundred forty-four million, four hundred twenty-eight thousand, nine hundred four".