28144935 has 128 divisors (see below), whose sum is σ = 64512000. Its totient is φ = 11321856.

The previous prime is 28144927. The next prime is 28144943. The reversal of 28144935 is 53944182.

It is an interprime number because it is at equal distance from previous prime (28144927) and next prime (28144943).

It is not a de Polignac number, because 28144935 - 2³ = 28144927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28144935.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 356226 + ... + 356304.

It is an arithmetic number, because the mean of its divisors is an integer number (504000).

Almost surely, 2^28144935 is an apocalyptic number.

28144935 is an abundant number, since it is smaller than the sum of its proper divisors (36367065).

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

28144935 is a wasteful number, since it uses less digits than its factorization.

28144935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 136 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 28144935 is about 5305.1800157959. The cubic root of 28144935 is about 304.1819338889.

The spelling of 28144935 in words is "twenty-eight million, one hundred forty-four thousand, nine hundred thirty-five".