140128632 has 72 divisors (see below), whose sum is σ = 441487800. Its totient is φ = 40035744.

The previous prime is 140128621. The next prime is 140128643. The reversal of 140128632 is 236821041.

140128632 is a `hidden beast` number, since 1 + 4 + 0 + 1 + 28 + 632 = 666.

It is an interprime number because it is at equal distance from previous prime (140128621) and next prime (140128643).

It is a tau number, because it is divible by the number of its divisors (72).

It is a junction number, because it is equal to n+sod(n) for n = 140128596 and 140128605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 16332 + ... + 23387.

It is an arithmetic number, because the mean of its divisors is an integer number (6131775).

Almost surely, 2^140128632 is an apocalyptic number.

140128632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

140128632 is an abundant number, since it is smaller than the sum of its proper divisors (301359168).

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

140128632 is a wasteful number, since it uses less digits than its factorization.

140128632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39745 (or 39731 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 140128632 is about 11837.5940122983. The cubic root of 140128632 is about 519.4083902908.

Adding to 140128632 its reverse (236821041), we get a palindrome (376949673).

The spelling of 140128632 in words is "one hundred forty million, one hundred twenty-eight thousand, six hundred thirty-two".