80406240 has 96 divisors (see below), whose sum is σ = 255467520. Its totient is φ = 21256704.

The previous prime is 80406239. The next prime is 80406301. The reversal of 80406240 is 4260408.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 80406240.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60301 + ... + 61619.

It is an arithmetic number, because the mean of its divisors is an integer number (2661120).

Almost surely, 2^80406240 is an apocalyptic number.

80406240 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 80406240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127733760).

80406240 is an abundant number, since it is smaller than the sum of its proper divisors (175061280).

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

80406240 is a wasteful number, since it uses less digits than its factorization.

80406240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464 (or 1456 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 80406240 is about 8966.9526596275. The cubic root of 80406240 is about 431.6150548915.

Adding to 80406240 its reverse (4260408), we get a palindrome (84666648).

The spelling of 80406240 in words is "eighty million, four hundred six thousand, two hundred forty".