1023128356 has 12 divisors (see below), whose sum is σ = 1819827100. Its totient is φ = 503177760.

The previous prime is 1023128347. The next prime is 1023128419. The reversal of 1023128356 is 6538213201.

It can be written as a sum of positive squares in 2 ways, for example, as 28987456 + 994140900 = 5384^2 + 31530^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2096331 + ... + 2096818.

Almost surely, 2^1023128356 is an apocalyptic number.

It is an amenable number.

1023128356 is a deficient number, since it is larger than the sum of its proper divisors (796698744).

1023128356 is a wasteful number, since it uses less digits than its factorization.

1023128356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193214 (or 4193212 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1023128356 is about 31986.3776629990. The cubic root of 1023128356 is about 1007.6507684645.

The spelling of 1023128356 in words is "one billion, twenty-three million, one hundred twenty-eight thousand, three hundred fifty-six".