145540836 has 144 divisors (see below), whose sum is σ = 448156800. Its totient is φ = 38900736.

The previous prime is 145540819. The next prime is 145540861. The reversal of 145540836 is 638045541.

It is a happy number.

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 145540836.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 540910 + ... + 541178.

It is an arithmetic number, because the mean of its divisors is an integer number (3112200).

Almost surely, 2^145540836 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 145540836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224078400).

145540836 is an abundant number, since it is smaller than the sum of its proper divisors (302615964).

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

145540836 is a wasteful number, since it uses less digits than its factorization.

145540836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 145540836 is about 12064.0306697223. The cubic root of 145540836 is about 526.0111560135.

The spelling of 145540836 in words is "one hundred forty-five million, five hundred forty thousand, eight hundred thirty-six".