80437440 has 112 divisors (see below), whose sum is σ = 266565888. Its totient is φ = 20511744.

The previous prime is 80437433. The next prime is 80437451. The reversal of 80437440 is 4473408.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 80437398 and 80437407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20259 + ... + 23901.

Almost surely, 2^80437440 is an apocalyptic number.

80437440 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 80437440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (133282944).

80437440 is an abundant number, since it is smaller than the sum of its proper divisors (186128448).

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

80437440 is a wasteful number, since it uses less digits than its factorization.

80437440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686 (or 3676 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 80437440 is about 8968.6922123574. The cubic root of 80437440 is about 431.6708741426.

The spelling of 80437440 in words is "eighty million, four hundred thirty-seven thousand, four hundred forty".