42628515 has 16 divisors (see below), whose sum is σ = 68503968. Its totient is φ = 22635776.

The previous prime is 42628501. The next prime is 42628517. The reversal of 42628515 is 51582624.

42628515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 42628515 - 2⁸ = 42628259 is a prime.

It is a super-2 number, since 2×42628515² = 3634380582210450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42628517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2604 + ... + 9593.

It is an arithmetic number, because the mean of its divisors is an integer number (4281498).

Almost surely, 2^42628515 is an apocalyptic number.

42628515 is a deficient number, since it is larger than the sum of its proper divisors (25875453).

42628515 is a wasteful number, since it uses less digits than its factorization.

42628515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12438.

The product of its digits is 19200, while the sum is 33.

The square root of 42628515 is about 6529.0516156636. The cubic root of 42628515 is about 349.3280031147.

The spelling of 42628515 in words is "forty-two million, six hundred twenty-eight thousand, five hundred fifteen".