140624640 has 288 divisors, whose sum is σ = 539125440. Its totient is φ = 34504704.

The previous prime is 140624633. The next prime is 140624641. The reversal of 140624640 is 46426041.

140624640 is a `hidden beast` number, since 14 + 0 + 6 + 2 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (140624641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 449124 + ... + 449436.

Almost surely, 2^140624640 is an apocalyptic number.

140624640 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 140624640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269562720).

140624640 is an abundant number, since it is smaller than the sum of its proper divisors (398500800).

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

140624640 is a wasteful number, since it uses less digits than its factorization.

140624640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356 (or 336 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 140624640 is about 11858.5260466889. The cubic root of 140624640 is about 520.0205120114.

The spelling of 140624640 in words is "one hundred forty million, six hundred twenty-four thousand, six hundred forty".