80503840 has 72 divisors (see below), whose sum is σ = 202152132. Its totient is φ = 30289920.

The previous prime is 80503837. The next prime is 80503859. The reversal of 80503840 is 4830508.

It can be written as a sum of positive squares in 6 ways, for example, as 28259856 + 52243984 = 5316^2 + 7228^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 80503799 and 80503808.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45370 + ... + 47110.

Almost surely, 2^80503840 is an apocalyptic number.

80503840 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 80503840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101076066).

80503840 is an abundant number, since it is smaller than the sum of its proper divisors (121648292).

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

80503840 is a wasteful number, since it uses less digits than its factorization.

80503840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1790 (or 1765 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 80503840 is about 8972.3932147449. The cubic root of 80503840 is about 431.7896209298.

The spelling of 80503840 in words is "eighty million, five hundred three thousand, eight hundred forty".