26220402 has 64 divisors (see below), whose sum is σ = 64350720. Its totient is φ = 7862400.

The previous prime is 26220377. The next prime is 26220419. The reversal of 26220402 is 20402262.

It is a happy number.

26220402 is a `hidden beast` number, since 2 + 622 + 0 + 40 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28327 + ... + 29237.

It is an arithmetic number, because the mean of its divisors is an integer number (1005480).

Almost surely, 2^26220402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26220402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32175360).

26220402 is an abundant number, since it is smaller than the sum of its proper divisors (38130318).

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

26220402 is a wasteful number, since it uses less digits than its factorization.

26220402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 26220402 is about 5120.5860992664. The cubic root of 26220402 is about 297.0843551838.

Adding to 26220402 its reverse (20402262), we get a palindrome (46622664).

The spelling of 26220402 in words is "twenty-six million, two hundred twenty thousand, four hundred two".