22146478 has 16 divisors (see below), whose sum is σ = 36033984. Its totient is φ = 10167040.

The previous prime is 22146469. The next prime is 22146479. The reversal of 22146478 is 87464122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22146479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6550 + ... + 9337.

It is an arithmetic number, because the mean of its divisors is an integer number (2252124).

Almost surely, 2^22146478 is an apocalyptic number.

22146478 is a deficient number, since it is larger than the sum of its proper divisors (13887506).

22146478 is a wasteful number, since it uses less digits than its factorization.

22146478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15947.

The product of its digits is 21504, while the sum is 34.

The square root of 22146478 is about 4706.0044623863. The cubic root of 22146478 is about 280.8244324025.

The spelling of 22146478 in words is "twenty-two million, one hundred forty-six thousand, four hundred seventy-eight".