135943890 has 16 divisors (see below), whose sum is σ = 326265408. Its totient is φ = 36251696.

The previous prime is 135943837. The next prime is 135943891. The reversal of 135943890 is 98349531.

It is not an unprimeable number, because it can be changed into a prime (135943891) 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, 2265702 + ... + 2265761.

It is an arithmetic number, because the mean of its divisors is an integer number (20391588).

Almost surely, 2^135943890 is an apocalyptic number.

135943890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135943890 is an abundant number, since it is smaller than the sum of its proper divisors (190321518).

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

135943890 is a wasteful number, since it uses less digits than its factorization.

135943890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4531473.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 135943890 is about 11659.4978451047. The cubic root of 135943890 is about 514.1855855552.

The spelling of 135943890 in words is "one hundred thirty-five million, nine hundred forty-three thousand, eight hundred ninety".