207740064 has 48 divisors (see below), whose sum is σ = 623222208. Its totient is φ = 59354112.

The previous prime is 207740041. The next prime is 207740069. The reversal of 207740064 is 460047702.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (207740069) 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, 153897 + ... + 155240.

It is an arithmetic number, because the mean of its divisors is an integer number (12983796).

Almost surely, 2^207740064 is an apocalyptic number.

207740064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

207740064 is an abundant number, since it is smaller than the sum of its proper divisors (415482144).

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

207740064 is a wasteful number, since it uses less digits than its factorization.

207740064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309157 (or 309149 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 207740064 is about 14413.1906252571. The cubic root of 207740064 is about 592.2522968930.

Adding to 207740064 its reverse (460047702), we get a palindrome (667787766).

The spelling of 207740064 in words is "two hundred seven million, seven hundred forty thousand, sixty-four".