144071640 has 48 divisors (see below), whose sum is σ = 468234000. Its totient is φ = 38419008.

The previous prime is 144071633. The next prime is 144071671. The reversal of 144071640 is 46170441.

144071640 is a `hidden beast` number, since 14 + 4 + 0 + 7 + 1 + 640 = 666.

144071640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199740 + ... + 200459.

It is an arithmetic number, because the mean of its divisors is an integer number (9754875).

Almost surely, 2^144071640 is an apocalyptic number.

144071640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

144071640 is an abundant number, since it is smaller than the sum of its proper divisors (324162360).

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

144071640 is a wasteful number, since it uses less digits than its factorization.

144071640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400216 (or 400209 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 144071640 is about 12002.9846288329. The cubic root of 144071640 is about 524.2351856876.

The spelling of 144071640 in words is "one hundred forty-four million, seventy-one thousand, six hundred forty".