1023531128 has 16 divisors (see below), whose sum is σ = 1947765480. Its totient is φ = 504127008.

The previous prime is 1023531127. The next prime is 1023531151. The reversal of 1023531128 is 8211353201.

It is a junction number, because it is equal to n+sod(n) for n = 1023531097 and 1023531106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023531127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954251 + ... + 955322.

Almost surely, 2^1023531128 is an apocalyptic number.

It is an amenable number.

1023531128 is a deficient number, since it is larger than the sum of its proper divisors (924234352).

1023531128 is a wasteful number, since it uses less digits than its factorization.

1023531128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1909646 (or 1909642 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1023531128 is about 31992.6730361813. The cubic root of 1023531128 is about 1007.7829774448.

Adding to 1023531128 its reverse (8211353201), we get a palindrome (9234884329).

The spelling of 1023531128 in words is "one billion, twenty-three million, five hundred thirty-one thousand, one hundred twenty-eight".