1904684545 has 8 divisors (see below), whose sum is σ = 2405917440. Its totient is φ = 1443550320.

The previous prime is 1904684543. The next prime is 1904684603. The reversal of 1904684545 is 5454864091.

It is a happy number.

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

It is not a de Polignac number, because 1904684545 - 2¹ = 1904684543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1904684495 and 1904684504.

It is not an unprimeable number, because it can be changed into a prime (1904684543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10024561 + ... + 10024750.

It is an arithmetic number, because the mean of its divisors is an integer number (300739680).

Almost surely, 2^1904684545 is an apocalyptic number.

It is an amenable number.

1904684545 is a deficient number, since it is larger than the sum of its proper divisors (501232895).

1904684545 is a wasteful number, since it uses less digits than its factorization.

1904684545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20049335.

The product of its (nonzero) digits is 691200, while the sum is 46.

The square root of 1904684545 is about 43642.6917707879. The cubic root of 1904684545 is about 1239.5794066534.

The spelling of 1904684545 in words is "one billion, nine hundred four million, six hundred eighty-four thousand, five hundred forty-five".