1004400135 has 32 divisors (see below), whose sum is σ = 1879584000. Its totient is φ = 507485088.

The previous prime is 1004400127. The next prime is 1004400139. The reversal of 1004400135 is 5310044001.

It is a happy number.

It is not a de Polignac number, because 1004400135 - 2³ = 1004400127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004400139) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193225 + ... + 198354.

It is an arithmetic number, because the mean of its divisors is an integer number (58737000).

Almost surely, 2^1004400135 is an apocalyptic number.

1004400135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1004400135 is a deficient number, since it is larger than the sum of its proper divisors (875183865).

1004400135 is a wasteful number, since it uses less digits than its factorization.

1004400135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391612 (or 391606 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1004400135 is about 31692.2724808430. The cubic root of 1004400135 is about 1001.4645656669.

Adding to 1004400135 its reverse (5310044001), we get a palindrome (6314444136).

The spelling of 1004400135 in words is "one billion, four million, four hundred thousand, one hundred thirty-five".