148531840 has 32 divisors (see below), whose sum is σ = 355085460. Its totient is φ = 59412480.

The previous prime is 148531837. The next prime is 148531843. The reversal of 148531840 is 48135841.

It is an interprime number because it is at equal distance from previous prime (148531837) and next prime (148531843).

It can be written as a sum of positive squares in 2 ways, for example, as 140375104 + 8156736 = 11848^2 + 2856^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 148531796 and 148531805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148531843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115401 + ... + 116680.

Almost surely, 2^148531840 is an apocalyptic number.

148531840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

148531840 is an abundant number, since it is smaller than the sum of its proper divisors (206553620).

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

148531840 is an equidigital number, since it uses as much as digits as its factorization.

148531840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232100 (or 232088 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 148531840 is about 12187.3639479586. The cubic root of 148531840 is about 529.5900948303.

The spelling of 148531840 in words is "one hundred forty-eight million, five hundred thirty-one thousand, eight hundred forty".