62640138 has 32 divisors (see below), whose sum is σ = 144711360. Its totient is φ = 17864960.

The previous prime is 62640133. The next prime is 62640157. The reversal of 62640138 is 83104626.

62640138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (62640133) 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 15 ways as a sum of consecutive naturals, for example, 26793 + ... + 29036.

It is an arithmetic number, because the mean of its divisors is an integer number (4522230).

Almost surely, 2^62640138 is an apocalyptic number.

62640138 is an abundant number, since it is smaller than the sum of its proper divisors (82071222).

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

62640138 is a wasteful number, since it uses less digits than its factorization.

62640138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55862.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 62640138 is about 7914.5522930865. The cubic root of 62640138 is about 397.1466485278.

The spelling of 62640138 in words is "sixty-two million, six hundred forty thousand, one hundred thirty-eight".