140523420 has 48 divisors (see below), whose sum is σ = 401845248. Its totient is φ = 36674880.

The previous prime is 140523407. The next prime is 140523437. The reversal of 140523420 is 24325041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22096 + ... + 27735.

It is an arithmetic number, because the mean of its divisors is an integer number (8371776).

Almost surely, 2^140523420 is an apocalyptic number.

140523420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140523420 is an abundant number, since it is smaller than the sum of its proper divisors (261321828).

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

140523420 is a wasteful number, since it uses less digits than its factorization.

140523420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49890 (or 49888 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 140523420 is about 11854.2574630383. The cubic root of 140523420 is about 519.8957138008.

Adding to 140523420 its reverse (24325041), we get a palindrome (164848461).

The spelling of 140523420 in words is "one hundred forty million, five hundred twenty-three thousand, four hundred twenty".