64138434 has 32 divisors (see below), whose sum is σ = 130870080. Its totient is φ = 20952000.

The previous prime is 64138423. The next prime is 64138447. The reversal of 64138434 is 43483146.

It is a happy number.

64138434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64138434² = 8227477431944712, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64138395 and 64138404.

It is an unprimeable number.

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, 65569 + ... + 66539.

It is an arithmetic number, because the mean of its divisors is an integer number (4089690).

Almost surely, 2^64138434 is an apocalyptic number.

64138434 is an abundant number, since it is smaller than the sum of its proper divisors (66731646).

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

64138434 is a wasteful number, since it uses less digits than its factorization.

64138434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186.

The product of its digits is 27648, while the sum is 33.

The square root of 64138434 is about 8008.6474513491. The cubic root of 64138434 is about 400.2881964738.

The spelling of 64138434 in words is "sixty-four million, one hundred thirty-eight thousand, four hundred thirty-four".