140805280 has 144 divisors (see below), whose sum is σ = 418279680. Its totient is φ = 43845120.

The previous prime is 140805277. The next prime is 140805307. The reversal of 140805280 is 82508041.

It is a super-2 number, since 2×140805280² = 39652253751756800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135001 + ... + 136039.

It is an arithmetic number, because the mean of its divisors is an integer number (2904720).

Almost surely, 2^140805280 is an apocalyptic number.

140805280 is a gapful number since it is divisible by the number (10) 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 140805280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209139840).

140805280 is an abundant number, since it is smaller than the sum of its proper divisors (277474400).

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

140805280 is a wasteful number, since it uses less digits than its factorization.

140805280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 140805280 is about 11866.1400632219. The cubic root of 140805280 is about 520.2430816165.

The spelling of 140805280 in words is "one hundred forty million, eight hundred five thousand, two hundred eighty".