64420734 has 32 divisors (see below), whose sum is σ = 147663360. Its totient is φ = 18353952.

The previous prime is 64420709. The next prime is 64420739. The reversal of 64420734 is 43702446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64420739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14367 + ... + 18309.

It is an arithmetic number, because the mean of its divisors is an integer number (4614480).

Almost surely, 2^64420734 is an apocalyptic number.

64420734 is an abundant number, since it is smaller than the sum of its proper divisors (83242626).

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

64420734 is a wasteful number, since it uses less digits than its factorization.

64420734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4344.

The product of its (nonzero) digits is 16128, while the sum is 30.

The square root of 64420734 is about 8026.2527994077. The cubic root of 64420734 is about 400.8746153926.

The spelling of 64420734 in words is "sixty-four million, four hundred twenty thousand, seven hundred thirty-four".