22780890 has 48 divisors (see below), whose sum is σ = 64617696. Its totient is φ = 5522400.

The previous prime is 22780889. The next prime is 22780931. The reversal of 22780890 is 9808722.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10516 + ... + 12495.

It is an arithmetic number, because the mean of its divisors is an integer number (1346202).

Almost surely, 2^22780890 is an apocalyptic number.

22780890 is an abundant number, since it is smaller than the sum of its proper divisors (41836806).

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

22780890 is a wasteful number, since it uses less digits than its factorization.

22780890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23035 (or 23032 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 22780890 is about 4772.9330604985. The cubic root of 22780890 is about 283.4807429787.

The spelling of 22780890 in words is "twenty-two million, seven hundred eighty thousand, eight hundred ninety".