22148478 has 56 divisors (see below), whose sum is σ = 54378936. Its totient is φ = 6706800.

The previous prime is 22148447. The next prime is 22148479. The reversal of 22148478 is 87484122.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22148479) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 15348 + ... + 16728.

Almost surely, 2^22148478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22148478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27189468).

22148478 is an abundant number, since it is smaller than the sum of its proper divisors (32230458).

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

22148478 is a wasteful number, since it uses less digits than its factorization.

22148478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1397 counting only the distinct ones).

The product of its digits is 28672, while the sum is 36.

The square root of 22148478 is about 4706.2169520752. The cubic root of 22148478 is about 280.8328856948.

The spelling of 22148478 in words is "twenty-two million, one hundred forty-eight thousand, four hundred seventy-eight".