1023999998 has 64 divisors (see below), whose sum is σ = 1960132608. Its totient is φ = 391080960.

The previous prime is 1023999989. The next prime is 1024000009. The reversal of 1023999998 is 8999993201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345290 + ... + 348242.

It is an arithmetic number, because the mean of its divisors is an integer number (30627072).

Almost surely, 2^1023999998 is an apocalyptic number.

1023999998 is a deficient number, since it is larger than the sum of its proper divisors (936132610).

1023999998 is a wasteful number, since it uses less digits than its factorization.

1023999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3057.

The product of its (nonzero) digits is 2834352, while the sum is 59.

The square root of 1023999998 is about 31999.9999687500. Note that the first 4 decimals coincide. The cubic root of 1023999998 is about 1007.9368392597.

The spelling of 1023999998 in words is "one billion, twenty-three million, nine hundred ninety-nine thousand, nine hundred ninety-eight".