1236105040 has 40 divisors (see below), whose sum is σ = 3025208160. Its totient is φ = 468418176.

The previous prime is 1236105007. The next prime is 1236105053. The reversal of 1236105040 is 405016321.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405094 + ... + 408133.

It is an arithmetic number, because the mean of its divisors is an integer number (75630204).

Almost surely, 2^1236105040 is an apocalyptic number.

1236105040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1236105040 is an abundant number, since it is smaller than the sum of its proper divisors (1789103120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1236105040 is a wasteful number, since it uses less digits than its factorization.

1236105040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813259 (or 813253 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1236105040 is about 35158.2855099619. The cubic root of 1236105040 is about 1073.2110255895.

It can be divided in two parts, 1236 and 105040, that added together give a square (106276 = 326²).

The spelling of 1236105040 in words is "one billion, two hundred thirty-six million, one hundred five thousand, forty".