64775420 has 12 divisors (see below), whose sum is σ = 136028424. Its totient is φ = 25910160.

The previous prime is 64775411. The next prime is 64775437. The reversal of 64775420 is 2457746.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1619366 + ... + 1619405.

It is an arithmetic number, because the mean of its divisors is an integer number (11335702).

Almost surely, 2^64775420 is an apocalyptic number.

It is an amenable number.

64775420 is an abundant number, since it is smaller than the sum of its proper divisors (71253004).

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

64775420 is a wasteful number, since it uses less digits than its factorization.

64775420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238780 (or 3238778 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 64775420 is about 8048.3178366662. The cubic root of 64775420 is about 401.6089776330.

It can be divided in two parts, 647 and 75420, that added together give a palindrome (76067).

The spelling of 64775420 in words is "sixty-four million, seven hundred seventy-five thousand, four hundred twenty".