140023220 has 24 divisors (see below), whose sum is σ = 311346504. Its totient is φ = 52714496.

The previous prime is 140023211. The next prime is 140023267. The reversal of 140023220 is 22320041.

It can be written as a sum of positive squares in 4 ways, for example, as 17522596 + 122500624 = 4186^2 + 11068^2 .

It is a junction number, because it is equal to n+sod(n) for n = 140023195 and 140023204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205577 + ... + 206256.

It is an arithmetic number, because the mean of its divisors is an integer number (12972771).

Almost surely, 2^140023220 is an apocalyptic number.

140023220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140023220 is an abundant number, since it is smaller than the sum of its proper divisors (171323284).

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

140023220 is a wasteful number, since it uses less digits than its factorization.

140023220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411859 (or 411857 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 140023220 is about 11833.1407496066. The cubic root of 140023220 is about 519.2781156727.

Adding to 140023220 its reverse (22320041), we get a palindrome (162343261).

The spelling of 140023220 in words is "one hundred forty million, twenty-three thousand, two hundred twenty".