140321664 has 96 divisors (see below), whose sum is σ = 461501040. Its totient is φ = 40089600.

The previous prime is 140321663. The next prime is 140321677. The reversal of 140321664 is 466123041.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140321663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 637 + ... + 16764.

Almost surely, 2^140321664 is an apocalyptic number.

140321664 is a gapful number since it is divisible by the number (14) 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 140321664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230750520).

140321664 is an abundant number, since it is smaller than the sum of its proper divisors (321179376).

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

140321664 is a wasteful number, since it uses less digits than its factorization.

140321664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17428 (or 17413 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 140321664 is about 11845.7445523699. The cubic root of 140321664 is about 519.6467818216.

The spelling of 140321664 in words is "one hundred forty million, three hundred twenty-one thousand, six hundred sixty-four".