80408440 has 32 divisors (see below), whose sum is σ = 206765280. Its totient is φ = 27568512.

The previous prime is 80408429. The next prime is 80408479. The reversal of 80408440 is 4480408.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 80408399 and 80408408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143307 + ... + 143866.

It is an arithmetic number, because the mean of its divisors is an integer number (6461415).

Almost surely, 2^80408440 is an apocalyptic number.

It is an amenable number.

80408440 is an abundant number, since it is smaller than the sum of its proper divisors (126356840).

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

80408440 is a wasteful number, since it uses less digits than its factorization.

80408440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287191 (or 287187 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 80408440 is about 8967.0753314556. The cubic root of 80408440 is about 431.6189913375.

Adding to 80408440 its reverse (4480408), we get a palindrome (84888848).

The spelling of 80408440 in words is "eighty million, four hundred eight thousand, four hundred forty".