148257438 has 48 divisors (see below), whose sum is σ = 356073984. Its totient is φ = 40990320.

The previous prime is 148257401. The next prime is 148257449. The reversal of 148257438 is 834752841.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 148257438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 981 + ... + 17247.

It is an arithmetic number, because the mean of its divisors is an integer number (7418208).

Almost surely, 2^148257438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 148257438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178036992).

148257438 is an abundant number, since it is smaller than the sum of its proper divisors (207816546).

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

148257438 is a wasteful number, since it uses less digits than its factorization.

148257438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16317 (or 16310 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 148257438 is about 12176.1011001059. The cubic root of 148257438 is about 529.2637671263.

The spelling of 148257438 in words is "one hundred forty-eight million, two hundred fifty-seven thousand, four hundred thirty-eight".