22778002 has 8 divisors (see below), whose sum is σ = 36795276. Its totient is φ = 10512912.

The previous prime is 22777973. The next prime is 22778009. The reversal of 22778002 is 20087722.

It can be written as a sum of positive squares in 2 ways, for example, as 22382361 + 395641 = 4731^2 + 629^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×22778002² = 1037674750224008, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22778009) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 438013 + ... + 438064.

Almost surely, 2^22778002 is an apocalyptic number.

22778002 is a deficient number, since it is larger than the sum of its proper divisors (14017274).

22778002 is a wasteful number, since it uses less digits than its factorization.

22778002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876092.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 22778002 is about 4772.6305115733. The cubic root of 22778002 is about 283.4687632451.

The spelling of 22778002 in words is "twenty-two million, seven hundred seventy-eight thousand, two".