235540209040 has 160 divisors (see below), whose sum is σ = 564882595200. Its totient is φ = 91287060480.

The previous prime is 235540209013. The next prime is 235540209049. The reversal of 235540209040 is 40902045532.

It is a junction number, because it is equal to n+sod(n) for n = 235540208987 and 235540209005.

It is not an unprimeable number, because it can be changed into a prime (235540209049) 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, 306293776 + ... + 306294544.

It is an arithmetic number, because the mean of its divisors is an integer number (3530516220).

Almost surely, 2^235540209040 is an apocalyptic number.

235540209040 is a gapful number since it is divisible by the number (20) 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 235540209040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282441297600).

235540209040 is an abundant number, since it is smaller than the sum of its proper divisors (329342386160).

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

235540209040 is a wasteful number, since it uses less digits than its factorization.

235540209040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425 (or 1419 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 235540209040 in words is "two hundred thirty-five billion, five hundred forty million, two hundred nine thousand, forty".