22461780 has 48 divisors (see below), whose sum is σ = 68612544. Its totient is φ = 5445120.

The previous prime is 22461757. The next prime is 22461787. The reversal of 22461780 is 8716422.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22461787) 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, 16357 + ... + 17676.

It is an arithmetic number, because the mean of its divisors is an integer number (1429428).

Almost surely, 2^22461780 is an apocalyptic number.

22461780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22461780 is an abundant number, since it is smaller than the sum of its proper divisors (46150764).

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

22461780 is a wasteful number, since it uses less digits than its factorization.

22461780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34056 (or 34054 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 22461780 is about 4739.3860361865. The cubic root of 22461780 is about 282.1508674144.

The spelling of 22461780 in words is "twenty-two million, four hundred sixty-one thousand, seven hundred eighty".