42660428 has 6 divisors (see below), whose sum is σ = 74655756. Its totient is φ = 21330212.

The previous prime is 42660407. The next prime is 42660451. The reversal of 42660428 is 82406624.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 42660394 and 42660403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332550 + ... + 5332557.

It is an arithmetic number, because the mean of its divisors is an integer number (12442626).

Almost surely, 2^42660428 is an apocalyptic number.

It is an amenable number.

42660428 is a deficient number, since it is larger than the sum of its proper divisors (31995328).

42660428 is a wasteful number, since it uses less digits than its factorization.

42660428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665111 (or 10665109 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 42660428 is about 6531.4950815261. The cubic root of 42660428 is about 349.4151538852.

The spelling of 42660428 in words is "forty-two million, six hundred sixty thousand, four hundred twenty-eight".