140805420 has 144 divisors (see below), whose sum is σ = 468840960. Its totient is φ = 31468416.

The previous prime is 140805419. The next prime is 140805421. The reversal of 140805420 is 24508041.

It is an interprime number because it is at equal distance from previous prime (140805419) and next prime (140805421).

It is not an unprimeable number, because it can be changed into a prime (140805421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137671 + ... + 138689.

It is an arithmetic number, because the mean of its divisors is an integer number (3255840).

Almost surely, 2^140805420 is an apocalyptic number.

140805420 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 140805420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234420480).

140805420 is an abundant number, since it is smaller than the sum of its proper divisors (328035540).

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

140805420 is a wasteful number, since it uses less digits than its factorization.

140805420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 140805420 is about 11866.1459623586. The cubic root of 140805420 is about 520.2432540390.

The spelling of 140805420 in words is "one hundred forty million, eight hundred five thousand, four hundred twenty".