28420546 has 32 divisors (see below), whose sum is σ = 53498880. Its totient is φ = 11000400.

The previous prime is 28420541. The next prime is 28420547. The reversal of 28420546 is 64502482.

It is not an unprimeable number, because it can be changed into a prime (28420541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27051 + ... + 28081.

It is an arithmetic number, because the mean of its divisors is an integer number (1671840).

Almost surely, 2^28420546 is an apocalyptic number.

28420546 is a deficient number, since it is larger than the sum of its proper divisors (25078334).

28420546 is a wasteful number, since it uses less digits than its factorization.

28420546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 28420546 is about 5331.0923833676. The cubic root of 28420546 is about 305.1716171136.

The spelling of 28420546 in words is "twenty-eight million, four hundred twenty thousand, five hundred forty-six".