1616806840 has 96 divisors (see below), whose sum is σ = 4136832000. Its totient is φ = 567607040.

The previous prime is 1616806831. The next prime is 1616806859. The reversal of 1616806840 is 486086161.

It is a super-2 number, since 2×1616806840² = 5228128715741571200, which contains 22 as substring.

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 = 1616806793 and 1616806802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 134601 + ... + 146119.

It is an arithmetic number, because the mean of its divisors is an integer number (43092000).

Almost surely, 2^1616806840 is an apocalyptic number.

1616806840 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 1616806840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2068416000).

1616806840 is an abundant number, since it is smaller than the sum of its proper divisors (2520025160).

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

1616806840 is a wasteful number, since it uses less digits than its factorization.

1616806840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11581 (or 11566 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 1616806840 is about 40209.5366797480. The cubic root of 1616806840 is about 1173.6881305514.

The spelling of 1616806840 in words is "one billion, six hundred sixteen million, eight hundred six thousand, eight hundred forty".