1236540404 has 12 divisors (see below), whose sum is σ = 2360668128. Its totient is φ = 562063800.

The previous prime is 1236540401. The next prime is 1236540419. The reversal of 1236540404 is 4040456321.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1236540401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14051552 + ... + 14051639.

It is an arithmetic number, because the mean of its divisors is an integer number (196722344).

Almost surely, 2^1236540404 is an apocalyptic number.

It is an amenable number.

1236540404 is a deficient number, since it is larger than the sum of its proper divisors (1124127724).

1236540404 is a wasteful number, since it uses less digits than its factorization.

1236540404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28103206 (or 28103204 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 1236540404 is about 35164.4764499630. The cubic root of 1236540404 is about 1073.3370080332.

Adding to 1236540404 its reverse (4040456321), we get a palindrome (5276996725).

The spelling of 1236540404 in words is "one billion, two hundred thirty-six million, five hundred forty thousand, four hundred four".