544634640 has 120 divisors (see below), whose sum is σ = 1995372288. Its totient is φ = 132030720.

The previous prime is 544634633. The next prime is 544634647. The reversal of 544634640 is 46436445.

544634640 is a `hidden beast` number, since 5 + 4 + 4 + 6 + 3 + 4 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (544634633) and next prime (544634647).

It is a tau number, because it is divible by the number of its divisors (120).

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

It is a junction number, because it is equal to n+sod(n) for n = 544634595 and 544634604.

It is not an unprimeable number, because it can be changed into a prime (544634647) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 26464 + ... + 42303.

Almost surely, 2^544634640 is an apocalyptic number.

It is an amenable number.

544634640 is an abundant number, since it is smaller than the sum of its proper divisors (1450737648).

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

544634640 is a wasteful number, since it uses less digits than its factorization.

544634640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68797 (or 68788 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The square root of 544634640 is about 23337.4085965002. The cubic root of 544634640 is about 816.6483457411.

The spelling of 544634640 in words is "five hundred forty-four million, six hundred thirty-four thousand, six hundred forty".