42500028 has 12 divisors (see below), whose sum is σ = 99166760. Its totient is φ = 14166672.

The previous prime is 42500027. The next prime is 42500033. The reversal of 42500028 is 82000524.

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 = 42499977 and 42500013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42500023) 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, 1770823 + ... + 1770846.

Almost surely, 2^42500028 is an apocalyptic number.

It is an amenable number.

42500028 is an abundant number, since it is smaller than the sum of its proper divisors (56666732).

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

42500028 is a wasteful number, since it uses less digits than its factorization.

42500028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3541676 (or 3541674 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 42500028 is about 6519.2045527043. The cubic root of 42500028 is about 348.9766789834.

The spelling of 42500028 in words is "forty-two million, five hundred thousand, twenty-eight".