64806428 has 6 divisors (see below), whose sum is σ = 113411256. Its totient is φ = 32403212.

The previous prime is 64806421. The next prime is 64806451. The reversal of 64806428 is 82460846.

It is a happy number.

It is a super-2 number, since 2×64806428² = 8399746220238368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64806391 and 64806400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64806421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8100800 + ... + 8100807.

It is an arithmetic number, because the mean of its divisors is an integer number (18901876).

Almost surely, 2^64806428 is an apocalyptic number.

It is an amenable number.

64806428 is a deficient number, since it is larger than the sum of its proper divisors (48604828).

64806428 is a wasteful number, since it uses less digits than its factorization.

64806428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16201611 (or 16201609 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 64806428 is about 8050.2439714583. The cubic root of 64806428 is about 401.6730508293.

The spelling of 64806428 in words is "sixty-four million, eight hundred six thousand, four hundred twenty-eight".