22821378 has 32 divisors (see below), whose sum is σ = 49641984. Its totient is φ = 6964992.

The previous prime is 22821373. The next prime is 22821389. The reversal of 22821378 is 87312822.

It is not an unprimeable number, because it can be changed into a prime (22821371) 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, 751 + ... + 6797.

It is an arithmetic number, because the mean of its divisors is an integer number (1551312).

Almost surely, 2^22821378 is an apocalyptic number.

22821378 is an abundant number, since it is smaller than the sum of its proper divisors (26820606).

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

22821378 is a wasteful number, since it uses less digits than its factorization.

22821378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6106.

The product of its digits is 10752, while the sum is 33.

The square root of 22821378 is about 4777.1725947468. The cubic root of 22821378 is about 283.6485850518.

The spelling of 22821378 in words is "twenty-two million, eight hundred twenty-one thousand, three hundred seventy-eight".