64434540 has 24 divisors (see below), whose sum is σ = 180416880. Its totient is φ = 17182528.

The previous prime is 64434499. The next prime is 64434541. The reversal of 64434540 is 4543446.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 64434498 and 64434507.

It is not an unprimeable number, because it can be changed into a prime (64434541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536895 + ... + 537014.

It is an arithmetic number, because the mean of its divisors is an integer number (7517370).

Almost surely, 2^64434540 is an apocalyptic number.

64434540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64434540 is an abundant number, since it is smaller than the sum of its proper divisors (115982340).

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

64434540 is a wasteful number, since it uses less digits than its factorization.

64434540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073921 (or 1073919 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

The square root of 64434540 is about 8027.1128059845. The cubic root of 64434540 is about 400.9032504778.

Adding to 64434540 its reverse (4543446), we get a palindrome (68977986).

The spelling of 64434540 in words is "sixty-four million, four hundred thirty-four thousand, five hundred forty".