80061840 has 240 divisors, whose sum is σ = 295266816. Its totient is φ = 19353600.

The previous prime is 80061833. The next prime is 80061907. The reversal of 80061840 is 4816008.

80061840 is a `hidden beast` number, since 8 + 0 + 0 + 618 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 379335 + ... + 379545.

Almost surely, 2^80061840 is an apocalyptic number.

80061840 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 80061840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147633408).

80061840 is an abundant number, since it is smaller than the sum of its proper divisors (215204976).

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

80061840 is a wasteful number, since it uses less digits than its factorization.

80061840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 80061840 is about 8947.7282032927. The cubic root of 80061840 is about 430.9979346122.

Adding to 80061840 its reverse (4816008), we get a palindrome (84877848).

The spelling of 80061840 in words is "eighty million, sixty-one thousand, eight hundred forty".