640154350 has 48 divisors (see below), whose sum is σ = 1301340816. Its totient is φ = 232352000.

The previous prime is 640154341. The next prime is 640154351. The reversal of 640154350 is 53451046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640154351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 583002 + ... + 584098.

It is an arithmetic number, because the mean of its divisors is an integer number (27111267).

Almost surely, 2^640154350 is an apocalyptic number.

640154350 is an abundant number, since it is smaller than the sum of its proper divisors (661186466).

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

640154350 is a wasteful number, since it uses less digits than its factorization.

640154350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2181 (or 2176 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 640154350 is about 25301.2717071692. The cubic root of 640154350 is about 861.8431489847.

The spelling of 640154350 in words is "six hundred forty million, one hundred fifty-four thousand, three hundred fifty".