240128493 has 24 divisors (see below), whose sum is σ = 353367168. Its totient is φ = 144936000.

The previous prime is 240128491. The next prime is 240128501. The reversal of 240128493 is 394821042.

It is not a de Polignac number, because 240128493 - 2¹ = 240128491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240128491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97153 + ... + 99593.

It is an arithmetic number, because the mean of its divisors is an integer number (14723632).

Almost surely, 2^240128493 is an apocalyptic number.

It is an amenable number.

240128493 is a deficient number, since it is larger than the sum of its proper divisors (113238675).

240128493 is a wasteful number, since it uses less digits than its factorization.

240128493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737 (or 2726 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 240128493 is about 15496.0799236452. The cubic root of 240128493 is about 621.5573863005.

The spelling of 240128493 in words is "two hundred forty million, one hundred twenty-eight thousand, four hundred ninety-three".