80023440 has 320 divisors, whose sum is σ = 314265600. Its totient is φ = 16422912.

The previous prime is 80023439. The next prime is 80023451. The reversal of 80023440 is 4432008.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 734106 + ... + 734214.

It is an arithmetic number, because the mean of its divisors is an integer number (982080).

Almost surely, 2^80023440 is an apocalyptic number.

80023440 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 80023440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157132800).

80023440 is an abundant number, since it is smaller than the sum of its proper divisors (234242160).

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

80023440 is a wasteful number, since it uses less digits than its factorization.

80023440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 80023440 is about 8945.5821498659. The cubic root of 80023440 is about 430.9290171879.

Adding to 80023440 its reverse (4432008), we get a palindrome (84455448).

The spelling of 80023440 in words is "eighty million, twenty-three thousand, four hundred forty".