4538187440 has 20 divisors (see below), whose sum is σ = 10551285984. Its totient is φ = 1815274944.

The previous prime is 4538187439. The next prime is 4538187497. The reversal of 4538187440 is 447818354.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 4538187391 and 4538187400.

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 3 ways as a sum of consecutive naturals, for example, 28363592 + ... + 28363751.

Almost surely, 2^4538187440 is an apocalyptic number.

4538187440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4538187440 is an abundant number, since it is smaller than the sum of its proper divisors (6013098544).

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

4538187440 is a wasteful number, since it uses less digits than its factorization.

4538187440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56727356 (or 56727350 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 44.

The square root of 4538187440 is about 67366.0703915554. The cubic root of 4538187440 is about 1655.6205557077.

The spelling of 4538187440 in words is "four billion, five hundred thirty-eight million, one hundred eighty-seven thousand, four hundred forty".