22307985 has 72 divisors (see below), whose sum is σ = 45953856. Its totient is φ = 9979200.

The previous prime is 22307969. The next prime is 22308001. The reversal of 22307985 is 58970322.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22307969) and next prime (22308001).

It is not a de Polignac number, because 22307985 - 2⁴ = 22307969 is a prime.

It is a super-3 number, since 3×22307985³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 147660 + ... + 147810.

It is an arithmetic number, because the mean of its divisors is an integer number (638248).

Almost surely, 2^22307985 is an apocalyptic number.

It is an amenable number.

22307985 is an abundant number, since it is smaller than the sum of its proper divisors (23645871).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22307985 is a wasteful number, since it uses less digits than its factorization.

22307985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 22307985 is about 4723.1329644633. The cubic root of 22307985 is about 281.5054331289.

The spelling of 22307985 in words is "twenty-two million, three hundred seven thousand, nine hundred eighty-five".