140538816 has 168 divisors, whose sum is σ = 451000368. Its totient is φ = 41472000.

The previous prime is 140538803. The next prime is 140538821. The reversal of 140538816 is 618835041.

140538816 is a `hidden beast` number, since 1 + 40 + 538 + 81 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 259506 + ... + 260046.

It is an arithmetic number, because the mean of its divisors is an integer number (2684526).

Almost surely, 2^140538816 is an apocalyptic number.

140538816 is a gapful number since it is divisible by the number (16) 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 140538816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225500184).

140538816 is an abundant number, since it is smaller than the sum of its proper divisors (310461552).

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

140538816 is a wasteful number, since it uses less digits than its factorization.

140538816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 598 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 140538816 is about 11854.9068321940. The cubic root of 140538816 is about 519.9147000122.

The spelling of 140538816 in words is "one hundred forty million, five hundred thirty-eight thousand, eight hundred sixteen".