80197440 has 112 divisors (see below), whose sum is σ = 256885440. Its totient is φ = 21196800.

The previous prime is 80197421. The next prime is 80197457. The reversal of 80197440 is 4479108.

80197440 = T₈₉ + T₉₀ + ... + T₇₈₃.

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, 133140 + ... + 133740.

It is an arithmetic number, because the mean of its divisors is an integer number (2293620).

Almost surely, 2^80197440 is an apocalyptic number.

80197440 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 80197440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128442720).

80197440 is an abundant number, since it is smaller than the sum of its proper divisors (176688000).

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

80197440 is a wasteful number, since it uses less digits than its factorization.

80197440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 80197440 is about 8955.3023399548. The cubic root of 80197440 is about 431.2411231107.

The spelling of 80197440 in words is "eighty million, one hundred ninety-seven thousand, four hundred forty".