80837440 has 28 divisors (see below), whose sum is σ = 192494916. Its totient is φ = 32334848.

The previous prime is 80837411. The next prime is 80837441. The reversal of 80837440 is 4473808.

It can be written as a sum of positive squares in 2 ways, for example, as 16581184 + 64256256 = 4072^2 + 8016^2 .

It is a junction number, because it is equal to n+sod(n) for n = 80837396 and 80837405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80837441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125989 + ... + 126628.

Almost surely, 2^80837440 is an apocalyptic number.

80837440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80837440 is an abundant number, since it is smaller than the sum of its proper divisors (111657476).

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

80837440 is a wasteful number, since it uses less digits than its factorization.

80837440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252634 (or 252624 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 80837440 is about 8990.9643531715. The cubic root of 80837440 is about 432.3852302194.

The spelling of 80837440 in words is "eighty million, eight hundred thirty-seven thousand, four hundred forty".