548638740 has 72 divisors (see below), whose sum is σ = 1792227528. Its totient is φ = 135048960.

The previous prime is 548638729. The next prime is 548638751. The reversal of 548638740 is 47836845.

548638740 is a `hidden beast` number, since 5 + 4 + 8 + 638 + 7 + 4 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (548638729) and next prime (548638751).

It can be written as a sum of positive squares in 4 ways, for example, as 55532304 + 493106436 = 7452^2 + 22206^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114891 + ... + 119570.

It is an arithmetic number, because the mean of its divisors is an integer number (24892049).

Almost surely, 2^548638740 is an apocalyptic number.

It is an amenable number.

548638740 is an abundant number, since it is smaller than the sum of its proper divisors (1243588788).

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

548638740 is a wasteful number, since it uses less digits than its factorization.

548638740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234489 (or 234484 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 548638740 is about 23423.0386585515. The cubic root of 548638740 is about 818.6447671600.

The spelling of 548638740 in words is "five hundred forty-eight million, six hundred thirty-eight thousand, seven hundred forty".