42728512 has 28 divisors (see below), whose sum is σ = 85244940. Its totient is φ = 21249536.

The previous prime is 42728507. The next prime is 42728533. The reversal of 42728512 is 21582724.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 41679936 + 1048576 = 6456^2 + 1024^2 .

It is a congruent number.

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, 10914 + ... + 14302.

Almost surely, 2^42728512 is an apocalyptic number.

It is an amenable number.

42728512 is a deficient number, since it is larger than the sum of its proper divisors (42516428).

42728512 is a wasteful number, since it uses less digits than its factorization.

42728512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598 (or 3588 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The square root of 42728512 is about 6536.7049803399. The cubic root of 42728512 is about 349.6009383697.

The spelling of 42728512 in words is "forty-two million, seven hundred twenty-eight thousand, five hundred twelve".