22402978 has 24 divisors (see below), whose sum is σ = 36892800. Its totient is φ = 10196784.

The previous prime is 22402967. The next prime is 22402979. The reversal of 22402978 is 87920422.

It is not an unprimeable number, because it can be changed into a prime (22402979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26283 + ... + 27121.

It is an arithmetic number, because the mean of its divisors is an integer number (1537200).

Almost surely, 2^22402978 is an apocalyptic number.

22402978 is a deficient number, since it is larger than the sum of its proper divisors (14489822).

22402978 is a wasteful number, since it uses less digits than its factorization.

22402978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 22402978 is about 4733.1784246952. The cubic root of 22402978 is about 281.9044409050.

The spelling of 22402978 in words is "twenty-two million, four hundred two thousand, nine hundred seventy-eight".