80619840 has 448 divisors, whose sum is σ = 343326720. Its totient is φ = 17418240.

The previous prime is 80619823. The next prime is 80619863. The reversal of 80619840 is 4891608.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 6 and base 12.

It is a junction number, because it is equal to n+sod(n) for n = 80619795 and 80619804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1874859 + ... + 1874901.

Almost surely, 2^80619840 is an apocalyptic number.

80619840 is a gapful number since it is divisible by the number (80) 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 80619840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171663360).

80619840 is an abundant number, since it is smaller than the sum of its proper divisors (262706880).

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

80619840 is a wasteful number, since it uses less digits than its factorization.

80619840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 80619840 is about 8978.8551608766. The cubic root of 80619840 is about 431.9969135582.

The spelling of 80619840 in words is "eighty million, six hundred nineteen thousand, eight hundred forty".