1023440253 has 8 divisors (see below), whose sum is σ = 1488640416. Its totient is φ = 620266800.

The previous prime is 1023440203. The next prime is 1023440287. The reversal of 1023440253 is 3520443201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1023440253 - 2¹² = 1023436157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023440203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15506638 + ... + 15506703.

It is an arithmetic number, because the mean of its divisors is an integer number (186080052).

Almost surely, 2^1023440253 is an apocalyptic number.

It is an amenable number.

1023440253 is a deficient number, since it is larger than the sum of its proper divisors (465200163).

1023440253 is a wasteful number, since it uses less digits than its factorization.

1023440253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31013355.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 1023440253 is about 31991.2527575898. The cubic root of 1023440253 is about 1007.7531509660.

Adding to 1023440253 its reverse (3520443201), we get a palindrome (4543883454).

The spelling of 1023440253 in words is "one billion, twenty-three million, four hundred forty thousand, two hundred fifty-three".