22878297 has 12 divisors (see below), whose sum is σ = 35588644. Its totient is φ = 14078880.

The previous prime is 22878293. The next prime is 22878329. The reversal of 22878297 is 79287822.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2547216 + 20331081 = 1596^2 + 4509^2 .

It is not a de Polignac number, because 22878297 - 2² = 22878293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22878293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97654 + ... + 97887.

Almost surely, 2^22878297 is an apocalyptic number.

It is an amenable number.

22878297 is a deficient number, since it is larger than the sum of its proper divisors (12710347).

22878297 is a wasteful number, since it uses less digits than its factorization.

22878297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195560 (or 195557 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 22878297 is about 4783.1262789101. The cubic root of 22878297 is about 283.8842060840.

The spelling of 22878297 in words is "twenty-two million, eight hundred seventy-eight thousand, two hundred ninety-seven".