638114240 has 56 divisors (see below), whose sum is σ = 1599498960. Its totient is φ = 241809408.

The previous prime is 638114237. The next prime is 638114249. The reversal of 638114240 is 42411836.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638114249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46397 + ... + 58556.

Almost surely, 2^638114240 is an apocalyptic number.

It is an amenable number.

638114240 is an abundant number, since it is smaller than the sum of its proper divisors (961384720).

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

638114240 is a wasteful number, since it uses less digits than its factorization.

638114240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104989 (or 104979 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 638114240 is about 25260.9231818633. The cubic root of 638114240 is about 860.9266377627.

The spelling of 638114240 in words is "six hundred thirty-eight million, one hundred fourteen thousand, two hundred forty".