133445378 has 16 divisors (see below), whose sum is σ = 221132160. Its totient is φ = 59888400.

The previous prime is 133445363. The next prime is 133445381. The reversal of 133445378 is 873544331.

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, 36653 + ... + 40128.

It is an arithmetic number, because the mean of its divisors is an integer number (13820760).

Almost surely, 2^133445378 is an apocalyptic number.

133445378 is a deficient number, since it is larger than the sum of its proper divisors (87686782).

133445378 is a wasteful number, since it uses less digits than its factorization.

133445378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76873.

The product of its digits is 120960, while the sum is 38.

The square root of 133445378 is about 11551.8560413468. The cubic root of 133445378 is about 511.0160163382.

The spelling of 133445378 in words is "one hundred thirty-three million, four hundred forty-five thousand, three hundred seventy-eight".