64423732 has 24 divisors (see below), whose sum is σ = 117137160. Its totient is φ = 30965760.

The previous prime is 64423721. The next prime is 64423739. The reversal of 64423732 is 23732446.

It can be written as a sum of positive squares in 4 ways, for example, as 33108516 + 31315216 = 5754^2 + 5596^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64423694 and 64423703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64423739) 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, 28732 + ... + 30892.

It is an arithmetic number, because the mean of its divisors is an integer number (4880715).

Almost surely, 2^64423732 is an apocalyptic number.

It is an amenable number.

64423732 is a deficient number, since it is larger than the sum of its proper divisors (52713428).

64423732 is a wasteful number, since it uses less digits than its factorization.

64423732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451 (or 2449 counting only the distinct ones).

The product of its digits is 24192, while the sum is 31.

The square root of 64423732 is about 8026.4395593563. The cubic root of 64423732 is about 400.8808339053.

The spelling of 64423732 in words is "sixty-four million, four hundred twenty-three thousand, seven hundred thirty-two".