30287985 has 32 divisors (see below), whose sum is σ = 59646720. Its totient is φ = 12780288.

The previous prime is 30287951. The next prime is 30287993. The reversal of 30287985 is 58978203.

It is not a de Polignac number, because 30287985 - 2⁶ = 30287921 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9730 + ... + 12459.

It is an arithmetic number, because the mean of its divisors is an integer number (1863960).

Almost surely, 2^30287985 is an apocalyptic number.

30287985 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30287985 is a deficient number, since it is larger than the sum of its proper divisors (29358735).

30287985 is a wasteful number, since it uses less digits than its factorization.

30287985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22217.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 30287985 is about 5503.4520984560. The cubic root of 30287985 is about 311.7143485946.

The spelling of 30287985 in words is "thirty million, two hundred eighty-seven thousand, nine hundred eighty-five".