1023657849 has 36 divisors (see below), whose sum is σ = 1554549360. Its totient is φ = 649036080.

The previous prime is 1023657829. The next prime is 1023657853. The reversal of 1023657849 is 9487563201.

1023657849 is a `hidden beast` number, since 1 + 0 + 2 + 36 + 578 + 49 = 666.

1023657849 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1023657849 - 2¹⁶ = 1023592313 is a prime.

1023657849 is strictly pandigital in base 10.

It is not an unprimeable number, because it can be changed into a prime (1023657809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1004062 + ... + 1005080.

It is a 2-persistent number, because it is pandigital, and so is 2⋅1023657849 = 2047315698, but 3⋅1023657849 = 3070973547 is not.

Almost surely, 2^1023657849 is an apocalyptic number.

It is an amenable number.

1023657849 is a deficient number, since it is larger than the sum of its proper divisors (530891511).

1023657849 is a wasteful number, since it uses less digits than its factorization.

1023657849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282 (or 1256 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 1023657849 is about 31994.6534439740. The cubic root of 1023657849 is about 1007.8245661479.

The spelling of 1023657849 in words is "one billion, twenty-three million, six hundred fifty-seven thousand, eight hundred forty-nine".