22780349 has 4 divisors (see below), whose sum is σ = 22799136. Its totient is φ = 22761564.

The previous prime is 22780343. The next prime is 22780393. The reversal of 22780349 is 94308722.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94308722 = 2 ⋅47154361.

It is a cyclic number.

It is not a de Polignac number, because 22780349 - 2⁴ = 22780333 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 (22780343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7439 + ... + 10044.

It is an arithmetic number, because the mean of its divisors is an integer number (5699784).

Almost surely, 2^22780349 is an apocalyptic number.

It is an amenable number.

22780349 is a deficient number, since it is larger than the sum of its proper divisors (18787).

22780349 is a wasteful number, since it uses less digits than its factorization.

22780349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18786.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 22780349 is about 4772.8763864152. The cubic root of 22780349 is about 283.4784989298.

The spelling of 22780349 in words is "twenty-two million, seven hundred eighty thousand, three hundred forty-nine".