40646028 has 12 divisors (see below), whose sum is σ = 94840760. Its totient is φ = 13548672.

The previous prime is 40646027. The next prime is 40646041. The reversal of 40646028 is 82064604.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 40645986 and 40646004.

It is not an unprimeable number, because it can be changed into a prime (40646027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693573 + ... + 1693596.

Almost surely, 2^40646028 is an apocalyptic number.

It is an amenable number.

40646028 is an abundant number, since it is smaller than the sum of its proper divisors (54194732).

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

40646028 is a wasteful number, since it uses less digits than its factorization.

40646028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387176 (or 3387174 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 40646028 is about 6375.4237506224. The cubic root of 40646028 is about 343.8265192519.

The spelling of 40646028 in words is "forty million, six hundred forty-six thousand, twenty-eight".