148640640 has 64 divisors (see below), whose sum is σ = 473798160. Its totient is φ = 39636992.

The previous prime is 148640587. The next prime is 148640641. The reversal of 148640640 is 46046841.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148640641) 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, 36789 + ... + 40628.

Almost surely, 2^148640640 is an apocalyptic number.

148640640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

148640640 is an abundant number, since it is smaller than the sum of its proper divisors (325157520).

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

148640640 is an equidigital number, since it uses as much as digits as its factorization.

148640640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77439 (or 77427 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 148640640 is about 12191.8267704229. The cubic root of 148640640 is about 529.7193720260.

The spelling of 148640640 in words is "one hundred forty-eight million, six hundred forty thousand, six hundred forty".