1854545440 has 96 divisors (see below), whose sum is σ = 4817885184. Its totient is φ = 668989440.

The previous prime is 1854545437. The next prime is 1854545471. The reversal of 1854545440 is 445454581.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1854545393 and 1854545402.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 219372 + ... + 227668.

It is an arithmetic number, because the mean of its divisors is an integer number (50186304).

Almost surely, 2^1854545440 is an apocalyptic number.

1854545440 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 1854545440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2408942592).

1854545440 is an abundant number, since it is smaller than the sum of its proper divisors (2963339744).

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

1854545440 is a wasteful number, since it uses less digits than its factorization.

1854545440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8450 (or 8442 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 40.

The square root of 1854545440 is about 43064.4335850363. The cubic root of 1854545440 is about 1228.6056069196.

The spelling of 1854545440 in words is "one billion, eight hundred fifty-four million, five hundred forty-five thousand, four hundred forty".