140623640 has 32 divisors (see below), whose sum is σ = 317554560. Its totient is φ = 56044800.

The previous prime is 140623627. The next prime is 140623699. The reversal of 140623640 is 46326041.

140623640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4985 + ... + 17495.

It is an arithmetic number, because the mean of its divisors is an integer number (9923580).

Almost surely, 2^140623640 is an apocalyptic number.

140623640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140623640 is an abundant number, since it is smaller than the sum of its proper divisors (176930920).

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

140623640 is a wasteful number, since it uses less digits than its factorization.

140623640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12803 (or 12799 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 140623640 is about 11858.4838828579. The cubic root of 140623640 is about 520.0192793641.

Adding to 140623640 its reverse (46326041), we get a palindrome (186949681).

The spelling of 140623640 in words is "one hundred forty million, six hundred twenty-three thousand, six hundred forty".