140531328 has 256 divisors, whose sum is σ = 489926400. Its totient is φ = 38817792.

The previous prime is 140531323. The next prime is 140531341. The reversal of 140531328 is 823135041.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140531323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 895026 + ... + 895182.

It is an arithmetic number, because the mean of its divisors is an integer number (1913775).

Almost surely, 2^140531328 is an apocalyptic number.

140531328 is a gapful number since it is divisible by the number (18) 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 140531328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (244963200).

140531328 is an abundant number, since it is smaller than the sum of its proper divisors (349395072).

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

140531328 is a wasteful number, since it uses less digits than its factorization.

140531328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 140531328 is about 11854.5910093938. The cubic root of 140531328 is about 519.9054660499.

Adding to 140531328 its reverse (823135041), we get a palindrome (963666369).

The spelling of 140531328 in words is "one hundred forty million, five hundred thirty-one thousand, three hundred twenty-eight".