22002078 has 32 divisors (see below), whose sum is σ = 51321600. Its totient is φ = 6285720.

The previous prime is 22002077. The next prime is 22002107. The reversal of 22002078 is 87020022.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22002077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3288 + ... + 7403.

It is an arithmetic number, because the mean of its divisors is an integer number (1603800).

Almost surely, 2^22002078 is an apocalyptic number.

22002078 is an abundant number, since it is smaller than the sum of its proper divisors (29319522).

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

22002078 is a wasteful number, since it uses less digits than its factorization.

22002078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10717 (or 10703 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 22002078 is about 4690.6372701372. The cubic root of 22002078 is about 280.2127549662.

It can be divided in two parts, 2200 and 2078, that added together give a triangular number (4278 = T₉₂).

The spelling of 22002078 in words is "twenty-two million, two thousand, seventy-eight".