235640489 has 32 divisors (see below), whose sum is σ = 294604800. Its totient is φ = 183980160.

The previous prime is 235640467. The next prime is 235640549. The reversal of 235640489 is 984046532.

235640489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 235640489 - 2¹² = 235636393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (235640459) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 430514 + ... + 431060.

It is an arithmetic number, because the mean of its divisors is an integer number (9206400).

Almost surely, 2^235640489 is an apocalyptic number.

It is an amenable number.

235640489 is a deficient number, since it is larger than the sum of its proper divisors (58964311).

235640489 is a wasteful number, since it uses less digits than its factorization.

235640489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 235640489 is about 15350.5859497284. The cubic root of 235640489 is about 617.6607035280.

The spelling of 235640489 in words is "two hundred thirty-five million, six hundred forty thousand, four hundred eighty-nine".