80557140 has 96 divisors (see below), whose sum is σ = 234267264. Its totient is φ = 20666880.

The previous prime is 80557129. The next prime is 80557153. The reversal of 80557140 is 4175508.

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 = 80557098 and 80557107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 290682 + ... + 290958.

It is an arithmetic number, because the mean of its divisors is an integer number (2440284).

Almost surely, 2^80557140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80557140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117133632).

80557140 is an abundant number, since it is smaller than the sum of its proper divisors (153710124).

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

80557140 is a wasteful number, since it uses less digits than its factorization.

80557140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457 (or 455 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 30.

The square root of 80557140 is about 8975.3629453076. The cubic root of 80557140 is about 431.8848930292.

The spelling of 80557140 in words is "eighty million, five hundred fifty-seven thousand, one hundred forty".