133777988 has 24 divisors (see below), whose sum is σ = 241711008. Its totient is φ = 64745856.

The previous prime is 133777979. The next prime is 133777991. The reversal of 133777988 is 889777331.

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, 15995 + ... + 22877.

It is an arithmetic number, because the mean of its divisors is an integer number (10071292).

Almost surely, 2^133777988 is an apocalyptic number.

It is an amenable number.

133777988 is a deficient number, since it is larger than the sum of its proper divisors (107933020).

133777988 is a wasteful number, since it uses less digits than its factorization.

133777988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7043 (or 7041 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 53.

The square root of 133777988 is about 11566.2434696837. The cubic root of 133777988 is about 511.4402299006.

The spelling of 133777988 in words is "one hundred thirty-three million, seven hundred seventy-seven thousand, nine hundred eighty-eight".