148778238 has 32 divisors (see below), whose sum is σ = 351037440. Its totient is φ = 41136480.

The previous prime is 148778219. The next prime is 148778243. The reversal of 148778238 is 832877841.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55833 + ... + 58436.

It is an arithmetic number, because the mean of its divisors is an integer number (10969920).

Almost surely, 2^148778238 is an apocalyptic number.

148778238 is an abundant number, since it is smaller than the sum of its proper divisors (202259202).

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

148778238 is a wasteful number, since it uses less digits than its factorization.

148778238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114312.

The product of its digits is 602112, while the sum is 48.

The square root of 148778238 is about 12197.4685078503. The cubic root of 148778238 is about 529.8827769705.

The spelling of 148778238 in words is "one hundred forty-eight million, seven hundred seventy-eight thousand, two hundred thirty-eight".