28980985 has 16 divisors (see below), whose sum is σ = 39936960. Its totient is φ = 19967040.

The previous prime is 28980949. The next prime is 28981021. The reversal of 28980985 is 58908982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28980949) and next prime (28981021).

It is not a de Polignac number, because 28980985 - 2¹⁵ = 28948217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12822 + ... + 14911.

It is an arithmetic number, because the mean of its divisors is an integer number (2496060).

Almost surely, 2^28980985 is an apocalyptic number.

It is an amenable number.

28980985 is a deficient number, since it is larger than the sum of its proper divisors (10955975).

28980985 is a wasteful number, since it uses less digits than its factorization.

28980985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27768.

The product of its (nonzero) digits is 414720, while the sum is 49.

The square root of 28980985 is about 5383.3990192071. The cubic root of 28980985 is about 307.1645183415.

The spelling of 28980985 in words is "twenty-eight million, nine hundred eighty thousand, nine hundred eighty-five".