22398786 has 36 divisors (see below), whose sum is σ = 49759398. Its totient is φ = 7281792.

The previous prime is 22398767. The next prime is 22398793. The reversal of 22398786 is 68789322.

It can be written as a sum of positive squares in only one way, i.e., 20385225 + 2013561 = 4515^2 + 1419^2 .

It is a super-2 number, since 2×22398786² = 1003411228547592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 32946 + ... + 33618.

Almost surely, 2^22398786 is an apocalyptic number.

22398786 is an abundant number, since it is smaller than the sum of its proper divisors (27360612).

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

22398786 is a wasteful number, since it uses less digits than its factorization.

22398786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767 (or 721 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 22398786 is about 4732.7355725838. The cubic root of 22398786 is about 281.8868566783.

It can be divided in two parts, 2239 and 8786, that added together give a square (11025 = 105²).

The spelling of 22398786 in words is "twenty-two million, three hundred ninety-eight thousand, seven hundred eighty-six".