148656640 has 80 divisors (see below), whose sum is σ = 388903680. Its totient is φ = 54046720.

The previous prime is 148656623. The next prime is 148656643. The reversal of 148656640 is 46656841.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 148656593 and 148656602.

It is not an unprimeable number, because it can be changed into a prime (148656643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25521 + ... + 30799.

It is an arithmetic number, because the mean of its divisors is an integer number (4861296).

Almost surely, 2^148656640 is an apocalyptic number.

148656640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 148656640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194451840).

148656640 is an abundant number, since it is smaller than the sum of its proper divisors (240247040).

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

148656640 is an equidigital number, since it uses as much as digits as its factorization.

148656640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5313 (or 5297 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 148656640 is about 12192.4829300680. The cubic root of 148656640 is about 529.7383780571.

The spelling of 148656640 in words is "one hundred forty-eight million, six hundred fifty-six thousand, six hundred forty".