133540988 has 24 divisors (see below), whose sum is σ = 269732064. Its totient is φ = 56664000.

The previous prime is 133540961. The next prime is 133540991. The reversal of 133540988 is 889045331.

133540988 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×133540988² = 35666390952032288, which contains 22 as substring.

133540988 is strictly pandigital in base 9.

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, 20783 + ... + 26438.

It is an arithmetic number, because the mean of its divisors is an integer number (11238836).

Almost surely, 2^133540988 is an apocalyptic number.

It is an amenable number.

133540988 is an abundant number, since it is smaller than the sum of its proper divisors (136191076).

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

133540988 is a wasteful number, since it uses less digits than its factorization.

133540988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47333 (or 47331 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 133540988 is about 11555.9935963984. The cubic root of 133540988 is about 511.1380302492.

The spelling of 133540988 in words is "one hundred thirty-three million, five hundred forty thousand, nine hundred eighty-eight".