22978017 has 6 divisors (see below), whose sum is σ = 33190482. Its totient is φ = 15318672.

The previous prime is 22978003. The next prime is 22978061. The reversal of 22978017 is 71087922.

It can be written as a sum of positive squares in only one way, i.e., 22953681 + 24336 = 4791^2 + 156^2 .

It is not a de Polignac number, because 22978017 - 2¹¹ = 22975969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22978117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1276548 + ... + 1276565.

It is an arithmetic number, because the mean of its divisors is an integer number (5531747).

Almost surely, 2^22978017 is an apocalyptic number.

It is an amenable number.

22978017 is a deficient number, since it is larger than the sum of its proper divisors (10212465).

22978017 is a wasteful number, since it uses less digits than its factorization.

22978017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553119 (or 2553116 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 22978017 is about 4793.5390892325. The cubic root of 22978017 is about 284.2960651506.

The spelling of 22978017 in words is "twenty-two million, nine hundred seventy-eight thousand, seventeen".