140642236 has 24 divisors (see below), whose sum is σ = 287271936. Its totient is φ = 58992240.

The previous prime is 140642233. The next prime is 140642251. The reversal of 140642236 is 632246041.

140642236 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140642233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52120 + ... + 54751.

It is an arithmetic number, because the mean of its divisors is an integer number (11969664).

Almost surely, 2^140642236 is an apocalyptic number.

It is an amenable number.

140642236 is an abundant number, since it is smaller than the sum of its proper divisors (146629700).

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

140642236 is a wasteful number, since it uses less digits than its factorization.

140642236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106929 (or 106927 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 140642236 is about 11859.2679369344. The cubic root of 140642236 is about 520.0422007171.

Adding to 140642236 its reverse (632246041), we get a palindrome (772888277).

The spelling of 140642236 in words is "one hundred forty million, six hundred forty-two thousand, two hundred thirty-six".