1894459749 has 24 divisors (see below), whose sum is σ = 3125944512. Its totient is φ = 999273600.

The previous prime is 1894459709. The next prime is 1894459751. The reversal of 1894459749 is 9479544981.

It is not a de Polignac number, because 1894459749 - 2¹¹ = 1894457701 is a prime.

It is a super-2 number, since 2×1894459749² = 7177955481162286002, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1894459692 and 1894459701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1894459709) 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, 263352 + ... + 270449.

It is an arithmetic number, because the mean of its divisors is an integer number (130247688).

Almost surely, 2^1894459749 is an apocalyptic number.

It is an amenable number.

1894459749 is a deficient number, since it is larger than the sum of its proper divisors (1231484763).

1894459749 is a wasteful number, since it uses less digits than its factorization.

1894459749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533837 (or 533824 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The square root of 1894459749 is about 43525.3920028298. The cubic root of 1894459749 is about 1237.3573074121.

The spelling of 1894459749 in words is "one billion, eight hundred ninety-four million, four hundred fifty-nine thousand, seven hundred forty-nine".