1002331388 has 12 divisors (see below), whose sum is σ = 1755958512. Its totient is φ = 500628960.

The previous prime is 1002331331. The next prime is 1002331399. The reversal of 1002331388 is 8831332001.

It is a super-2 number, since 2×1002331388² = 2009336422740013088, 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 1002331388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129968 + ... + 137463.

It is an arithmetic number, because the mean of its divisors is an integer number (146329876).

Almost surely, 2^1002331388 is an apocalyptic number.

It is an amenable number.

1002331388 is a deficient number, since it is larger than the sum of its proper divisors (753627124).

1002331388 is a wasteful number, since it uses less digits than its factorization.

1002331388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268372 (or 268370 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1002331388 is about 31659.6176224540. The cubic root of 1002331388 is about 1000.7765261843.

Adding to 1002331388 its reverse (8831332001), we get a palindrome (9833663389).

The spelling of 1002331388 in words is "one billion, two million, three hundred thirty-one thousand, three hundred eighty-eight".