133378248 has 64 divisors (see below), whose sum is σ = 345643200. Its totient is φ = 42859520.

The previous prime is 133378241. The next prime is 133378249. The reversal of 133378248 is 842873331.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (133378241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86815 + ... + 88337.

It is an arithmetic number, because the mean of its divisors is an integer number (5400675).

Almost surely, 2^133378248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 133378248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172821600).

133378248 is an abundant number, since it is smaller than the sum of its proper divisors (212264952).

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

133378248 is a wasteful number, since it uses less digits than its factorization.

133378248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662 (or 1658 counting only the distinct ones).

The product of its digits is 96768, while the sum is 39.

The square root of 133378248 is about 11548.9500821503. The cubic root of 133378248 is about 510.9303127102.

The spelling of 133378248 in words is "one hundred thirty-three million, three hundred seventy-eight thousand, two hundred forty-eight".