148781538 has 36 divisors (see below), whose sum is σ = 330959538. Its totient is φ = 48276480.

The previous prime is 148781527. The next prime is 148781561. The reversal of 148781538 is 835187841.

It is a happy number.

148781538 is a `hidden beast` number, since 1 + 48 + 78 + 1 + 538 = 666.

148781538 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 106440489 + 42341049 = 10317^2 + 6507^2 .

It is a junction number, because it is equal to n+sod(n) for n = 148781493 and 148781502.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 331138 + ... + 331586.

Almost surely, 2^148781538 is an apocalyptic number.

148781538 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

148781538 is an abundant number, since it is smaller than the sum of its proper divisors (182178000).

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

148781538 is an equidigital number, since it uses as much as digits as its factorization.

148781538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 495 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 148781538 is about 12197.6037810711. The cubic root of 148781538 is about 529.8866946587.

The spelling of 148781538 in words is "one hundred forty-eight million, seven hundred eighty-one thousand, five hundred thirty-eight".