1002123432 has 48 divisors (see below), whose sum is σ = 2832092640. Its totient is φ = 319517088.

The previous prime is 1002123431. The next prime is 1002123457. The reversal of 1002123432 is 2343212001.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1002123431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 300918 + ... + 304229.

It is an arithmetic number, because the mean of its divisors is an integer number (59001930).

Almost surely, 2^1002123432 is an apocalyptic number.

1002123432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1002123432 is an abundant number, since it is smaller than the sum of its proper divisors (1829969208).

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

1002123432 is a wasteful number, since it uses less digits than its factorization.

1002123432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605182 (or 605175 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1002123432 is about 31656.3332052214. Note that the first 3 decimals coincide. The cubic root of 1002123432 is about 1000.7073102609.

Adding to 1002123432 its reverse (2343212001), we get a palindrome (3345335433).

The spelling of 1002123432 in words is "one billion, two million, one hundred twenty-three thousand, four hundred thirty-two".