2153660238 has 40 divisors (see below), whose sum is σ = 4886909280. Its totient is φ = 708795360.

The previous prime is 2153660237. The next prime is 2153660239. The reversal of 2153660238 is 8320663512.

It is a happy number.

2153660238 is a `hidden beast` number, since 2 + 15 + 3 + 6 + 602 + 38 = 666.

2153660238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2153660237) and next prime (2153660239).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2153660233) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 71343 + ... + 96938.

It is an arithmetic number, because the mean of its divisors is an integer number (122172732).

Almost surely, 2^2153660238 is an apocalyptic number.

2153660238 is an abundant number, since it is smaller than the sum of its proper divisors (2733249042).

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

2153660238 is a wasteful number, since it uses less digits than its factorization.

2153660238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168374 (or 168365 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 2153660238 is about 46407.5450546568. The cubic root of 2153660238 is about 1291.3948892025.

The spelling of 2153660238 in words is "two billion, one hundred fifty-three million, six hundred sixty thousand, two hundred thirty-eight".