148509138 has 32 divisors (see below), whose sum is σ = 304663680. Its totient is φ = 48245120.

The previous prime is 148509133. The next prime is 148509139. The reversal of 148509138 is 831905841.

It is a junction number, because it is equal to n+sod(n) for n = 148509096 and 148509105.

It is not an unprimeable number, because it can be changed into a prime (148509133) 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, 35956 + ... + 39872.

It is an arithmetic number, because the mean of its divisors is an integer number (9520740).

Almost surely, 2^148509138 is an apocalyptic number.

148509138 is an abundant number, since it is smaller than the sum of its proper divisors (156154542).

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

148509138 is a wasteful number, since it uses less digits than its factorization.

148509138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4082.

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 148509138 is about 12186.4325378677. The cubic root of 148509138 is about 529.5631121378.

The spelling of 148509138 in words is "one hundred forty-eight million, five hundred nine thousand, one hundred thirty-eight".