22478780 has 24 divisors (see below), whose sum is σ = 47696208. Its totient is φ = 8898048.

The previous prime is 22478779. The next prime is 22478791. The reversal of 22478780 is 8787422.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3854 + ... + 7733.

It is an arithmetic number, because the mean of its divisors is an integer number (1987342).

Almost surely, 2^22478780 is an apocalyptic number.

22478780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22478780 is an abundant number, since it is smaller than the sum of its proper divisors (25217428).

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

22478780 is a wasteful number, since it uses less digits than its factorization.

22478780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11693 (or 11691 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 22478780 is about 4741.1791782214. The cubic root of 22478780 is about 282.2220305958. Note that the first 3 decimals are identical.

The spelling of 22478780 in words is "twenty-two million, four hundred seventy-eight thousand, seven hundred eighty".