1002156404 has 12 divisors (see below), whose sum is σ = 1753997700. Its totient is φ = 501014208.

The previous prime is 1002156403. The next prime is 1002156413. The reversal of 1002156404 is 4046512001.

It can be written as a sum of positive squares in 2 ways, for example, as 631516900 + 370639504 = 25130^2 + 19252^2 .

It is a super-2 number, since 2×1002156404² = 2008634916156422432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1002156404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002156403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45512 + ... + 63840.

It is an arithmetic number, because the mean of its divisors is an integer number (146166475).

Almost surely, 2^1002156404 is an apocalyptic number.

It is an amenable number.

1002156404 is a deficient number, since it is larger than the sum of its proper divisors (751841296).

1002156404 is a wasteful number, since it uses less digits than its factorization.

1002156404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32002 (or 32000 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1002156404 is about 31656.8539814050. The cubic root of 1002156404 is about 1000.7182852761.

Adding to 1002156404 its reverse (4046512001), we get a palindrome (5048668405).

The spelling of 1002156404 in words is "one billion, two million, one hundred fifty-six thousand, four hundred four".