140039820 has 192 divisors, whose sum is σ = 460669440. Its totient is φ = 35271936.

The previous prime is 140039813. The next prime is 140039839. The reversal of 140039820 is 28930041.

It is a super-2 number, since 2×140039820² = 39222302371264800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 859059 + ... + 859221.

It is an arithmetic number, because the mean of its divisors is an integer number (2399320).

Almost surely, 2^140039820 is an apocalyptic number.

140039820 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 140039820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230334720).

140039820 is an abundant number, since it is smaller than the sum of its proper divisors (320629620).

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

140039820 is a wasteful number, since it uses less digits than its factorization.

140039820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 140039820 is about 11833.8421486853. The cubic root of 140039820 is about 519.2986353077.

Adding to 140039820 its reverse (28930041), we get a palindrome (168969861).

The spelling of 140039820 in words is "one hundred forty million, thirty-nine thousand, eight hundred twenty".