22202478 has 16 divisors (see below), whose sum is σ = 49338960. Its totient is φ = 7400808.

The previous prime is 22202473. The next prime is 22202489. The reversal of 22202478 is 87420222.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22202473) 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, 205525 + ... + 205632.

It is an arithmetic number, because the mean of its divisors is an integer number (3083685).

Almost surely, 2^22202478 is an apocalyptic number.

22202478 is an abundant number, since it is smaller than the sum of its proper divisors (27136482).

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

22202478 is a wasteful number, since it uses less digits than its factorization.

22202478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411168 (or 411162 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 22202478 is about 4711.9505515232. The cubic root of 22202478 is about 281.0609324853.

It can be divided in two parts, 22 and 202478, that added together give a square (202500 = 450²).

The spelling of 22202478 in words is "twenty-two million, two hundred two thousand, four hundred seventy-eight".