1906225389 has 24 divisors (see below), whose sum is σ = 2877443712. Its totient is φ = 1214841600.

The previous prime is 1906225381. The next prime is 1906225403. The reversal of 1906225389 is 9835226091.

1906225389 is a `hidden beast` number, since 1 + 90 + 6 + 22 + 538 + 9 = 666.

It is not a de Polignac number, because 1906225389 - 2³ = 1906225381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906225381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34212 + ... + 70589.

It is an arithmetic number, because the mean of its divisors is an integer number (119893488).

Almost surely, 2^1906225389 is an apocalyptic number.

It is an amenable number.

1906225389 is a deficient number, since it is larger than the sum of its proper divisors (971218323).

1906225389 is a wasteful number, since it uses less digits than its factorization.

1906225389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104897 (or 104894 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 1906225389 is about 43660.3411461706. The cubic root of 1906225389 is about 1239.9135798686.

The spelling of 1906225389 in words is "one billion, nine hundred six million, two hundred twenty-five thousand, three hundred eighty-nine".