1002155044 has 12 divisors (see below), whose sum is σ = 1913205168. Its totient is φ = 455525000.

The previous prime is 1002155029. The next prime is 1002155051. The reversal of 1002155044 is 4405512001.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11388082 + ... + 11388169.

It is an arithmetic number, because the mean of its divisors is an integer number (159433764).

Almost surely, 2^1002155044 is an apocalyptic number.

It is an amenable number.

1002155044 is a deficient number, since it is larger than the sum of its proper divisors (911050124).

1002155044 is a wasteful number, since it uses less digits than its factorization.

1002155044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22776266 (or 22776264 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1002155044 is about 31656.8325010573. The cubic root of 1002155044 is about 1000.7178325931.

Adding to 1002155044 its reverse (4405512001), we get a palindrome (5407667045).

The spelling of 1002155044 in words is "one billion, two million, one hundred fifty-five thousand, forty-four".