1540808136 has 160 divisors (see below), whose sum is σ = 4994743200. Its totient is φ = 440082720.

The previous prime is 1540808119. The next prime is 1540808149. The reversal of 1540808136 is 6318080451.

1540808136 is a `hidden beast` number, since 1 + 540 + 8 + 0 + 81 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1540808136.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 517131 + ... + 520101.

It is an arithmetic number, because the mean of its divisors is an integer number (31217145).

Almost surely, 2^1540808136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1540808136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2497371600).

1540808136 is an abundant number, since it is smaller than the sum of its proper divisors (3453935064).

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

1540808136 is an equidigital number, since it uses as much as digits as its factorization.

1540808136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014 (or 2983 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 1540808136 is about 39253.1289962979. The cubic root of 1540808136 is about 1155.0023140450.

Adding to 1540808136 its reverse (6318080451), we get a palindrome (7858888587).

The spelling of 1540808136 in words is "one billion, five hundred forty million, eight hundred eight thousand, one hundred thirty-six".