40542128 has 20 divisors (see below), whose sum is σ = 85691688. Its totient is φ = 18428160.

The previous prime is 40542119. The next prime is 40542167. The reversal of 40542128 is 82124504.

It is a happy number.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 40542097 and 40542106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115001 + ... + 115352.

Almost surely, 2^40542128 is an apocalyptic number.

It is an amenable number.

40542128 is an abundant number, since it is smaller than the sum of its proper divisors (45149560).

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

40542128 is a wasteful number, since it uses less digits than its factorization.

40542128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230372 (or 230366 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 40542128 is about 6367.2700586672. The cubic root of 40542128 is about 343.5333043963.

The spelling of 40542128 in words is "forty million, five hundred forty-two thousand, one hundred twenty-eight".