22780871 has 8 divisors (see below), whose sum is σ = 23687664. Its totient is φ = 21890880.

The previous prime is 22780859. The next prime is 22780873. The reversal of 22780871 is 17808722.

22780871 = 344² + 345² + ... + 477².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22780871 - 2¹⁴ = 22764487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22780873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1400 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (2960958).

Almost surely, 2^22780871 is an apocalyptic number.

22780871 is a deficient number, since it is larger than the sum of its proper divisors (906793).

22780871 is an equidigital number, since it uses as much as digits as its factorization.

22780871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8401.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 22780871 is about 4772.9310701078. The cubic root of 22780871 is about 283.4806641680.

The spelling of 22780871 in words is "twenty-two million, seven hundred eighty thousand, eight hundred seventy-one".