1894906440 has 384 divisors, whose sum is σ = 7480771200. Its totient is φ = 425295360.

The previous prime is 1894906439. The next prime is 1894906441. The reversal of 1894906440 is 446094981.

It is an interprime number because it is at equal distance from previous prime (1894906439) and next prime (1894906441).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (1894906441) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3227827 + ... + 3228413.

It is an arithmetic number, because the mean of its divisors is an integer number (19481175).

Almost surely, 2^1894906440 is an apocalyptic number.

1894906440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1894906440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3740385600).

1894906440 is an abundant number, since it is smaller than the sum of its proper divisors (5585864760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1894906440 is a wasteful number, since it uses less digits than its factorization.

1894906440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 1894906440 is about 43530.5230843830. The cubic root of 1894906440 is about 1237.4545511316.

The spelling of 1894906440 in words is "one billion, eight hundred ninety-four million, nine hundred six thousand, four hundred forty".