64203138 has 16 divisors (see below), whose sum is σ = 142673760. Its totient is φ = 21401028.

The previous prime is 64203137. The next prime is 64203149. The reversal of 64203138 is 83130246.

It is a happy number.

64203138 is a `hidden beast` number, since 642 + 0 + 3 + 13 + 8 = 666.

64203138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (64203131) 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 7 ways as a sum of consecutive naturals, for example, 594420 + ... + 594527.

It is an arithmetic number, because the mean of its divisors is an integer number (8917110).

Almost surely, 2^64203138 is an apocalyptic number.

64203138 is an abundant number, since it is smaller than the sum of its proper divisors (78470622).

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

64203138 is a wasteful number, since it uses less digits than its factorization.

64203138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188958 (or 1188952 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 64203138 is about 8012.6860664823. The cubic root of 64203138 is about 400.4227572001.

The spelling of 64203138 in words is "sixty-four million, two hundred three thousand, one hundred thirty-eight".