1002031998 has 32 divisors (see below), whose sum is σ = 2207492352. Its totient is φ = 300696000.

The previous prime is 1002031951. The next prime is 1002031999. The reversal of 1002031998 is 8991302001.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002031999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66903 + ... + 80498.

It is an arithmetic number, because the mean of its divisors is an integer number (68984136).

Almost surely, 2^1002031998 is an apocalyptic number.

1002031998 is an abundant number, since it is smaller than the sum of its proper divisors (1205460354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1002031998 is a wasteful number, since it uses less digits than its factorization.

1002031998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147520.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 1002031998 is about 31654.8890062815. The cubic root of 1002031998 is about 1000.6768744043.

Adding to 1002031998 its reverse (8991302001), we get a palindrome (9993333999).

It can be divided in two parts, 100203 and 1998, that added together give a palindrome (102201).

The spelling of 1002031998 in words is "one billion, two million, thirty-one thousand, nine hundred ninety-eight".