236538140 has 24 divisors (see below), whose sum is σ = 504146832. Its totient is φ = 93202560.

The previous prime is 236538121. The next prime is 236538157. The reversal of 236538140 is 41835632.

It is a junction number, because it is equal to n+sod(n) for n = 236538097 and 236538106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86921 + ... + 89600.

It is an arithmetic number, because the mean of its divisors is an integer number (21006118).

Almost surely, 2^236538140 is an apocalyptic number.

236538140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

236538140 is an abundant number, since it is smaller than the sum of its proper divisors (267608692).

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

236538140 is a wasteful number, since it uses less digits than its factorization.

236538140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176597 (or 176595 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 236538140 is about 15379.7964876002. The cubic root of 236538140 is about 618.4440171292. Note that the first 3 decimals are identical.

The spelling of 236538140 in words is "two hundred thirty-six million, five hundred thirty-eight thousand, one hundred forty".