1894620445 has 16 divisors (see below), whose sum is σ = 2314009728. Its totient is φ = 1488876480.

The previous prime is 1894620421. The next prime is 1894620479. The reversal of 1894620445 is 5440264981.

It is a de Polignac number, because none of the positive numbers 2^k-1894620445 is a prime.

It is a super-2 number, since 2×1894620445² = 7179173261223996050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88702 + ... + 107968.

It is an arithmetic number, because the mean of its divisors is an integer number (144625608).

Almost surely, 2^1894620445 is an apocalyptic number.

It is an amenable number.

1894620445 is a deficient number, since it is larger than the sum of its proper divisors (419389283).

1894620445 is a wasteful number, since it uses less digits than its factorization.

1894620445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19620.

The product of its (nonzero) digits is 276480, while the sum is 43.

The square root of 1894620445 is about 43527.2379665882. The cubic root of 1894620445 is about 1237.3922923637.

The spelling of 1894620445 in words is "one billion, eight hundred ninety-four million, six hundred twenty thousand, four hundred forty-five".