64128946 has 24 divisors (see below), whose sum is σ = 112178736. Its totient is φ = 27415080.

The previous prime is 64128941. The next prime is 64128949. The reversal of 64128946 is 64982146.

It is a super-2 number, since 2×64128946² = 8225043430141832, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64128899 and 64128908.

It is not an unprimeable number, because it can be changed into a prime (64128941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67245 + ... + 68191.

It is an arithmetic number, because the mean of its divisors is an integer number (4674114).

Almost surely, 2^64128946 is an apocalyptic number.

64128946 is a deficient number, since it is larger than the sum of its proper divisors (48049790).

64128946 is a wasteful number, since it uses less digits than its factorization.

64128946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654 (or 1647 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 64128946 is about 8008.0550697407. The cubic root of 64128946 is about 400.2684572864.

The spelling of 64128946 in words is "sixty-four million, one hundred twenty-eight thousand, nine hundred forty-six".