19402244 has 12 divisors (see below), whose sum is σ = 34064604. Its totient is φ = 9669504.

The previous prime is 19402237. The next prime is 19402283. The reversal of 19402244 is 44220491.

19402244 = 76² + 77² + ... + 388².

It can be written as a sum of positive squares in 2 ways, for example, as 8761600 + 10640644 = 2960^2 + 3262^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6497 + ... + 9000.

It is an arithmetic number, because the mean of its divisors is an integer number (2838717).

Almost surely, 2^19402244 is an apocalyptic number.

It is an amenable number.

19402244 is a deficient number, since it is larger than the sum of its proper divisors (14662360).

19402244 is a wasteful number, since it uses less digits than its factorization.

19402244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15814 (or 15812 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 19402244 is about 4404.7978387209. The cubic root of 19402244 is about 268.7100979880.

The spelling of 19402244 in words is "nineteen million, four hundred two thousand, two hundred forty-four".