64438077 has 16 divisors (see below), whose sum is σ = 94075200. Its totient is φ = 38908800.

The previous prime is 64438069. The next prime is 64438079. The reversal of 64438077 is 77083446.

It is a happy number.

It is not a de Polignac number, because 64438077 - 2³ = 64438069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64438079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5799 + ... + 12747.

It is an arithmetic number, because the mean of its divisors is an integer number (5879700).

Almost surely, 2^64438077 is an apocalyptic number.

It is an amenable number.

64438077 is a deficient number, since it is larger than the sum of its proper divisors (29637123).

64438077 is a wasteful number, since it uses less digits than its factorization.

64438077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7244.

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 64438077 is about 8027.3331187886. Note that the first 3 decimals coincide. The cubic root of 64438077 is about 400.9105859269.

The spelling of 64438077 in words is "sixty-four million, four hundred thirty-eight thousand, seventy-seven".