1816033840 has 40 divisors (see below), whose sum is σ = 4470651360. Its totient is φ = 683682816.

The previous prime is 1816033837. The next prime is 1816033871. The reversal of 1816033840 is 483306181.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 1816033796 and 1816033805.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666300 + ... + 669019.

It is an arithmetic number, because the mean of its divisors is an integer number (111766284).

Almost surely, 2^1816033840 is an apocalyptic number.

1816033840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1816033840 is an abundant number, since it is smaller than the sum of its proper divisors (2654617520).

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

1816033840 is a wasteful number, since it uses less digits than its factorization.

1816033840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335349 (or 1335343 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 1816033840 is about 42614.9485509486. The cubic root of 1816033840 is about 1220.0416182165.

The spelling of 1816033840 in words is "one billion, eight hundred sixteen million, thirty-three thousand, eight hundred forty".