207213840 has 120 divisors (see below), whose sum is σ = 704895360. Its totient is φ = 54542592.

The previous prime is 207213821. The next prime is 207213869. The reversal of 207213840 is 48312702.

It is a tau number, because it is divible by the number of its divisors (120).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55059 + ... + 58701.

It is an arithmetic number, because the mean of its divisors is an integer number (5874128).

Almost surely, 2^207213840 is an apocalyptic number.

207213840 is a gapful number since it is divisible by the number (20) 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 207213840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352447680).

207213840 is an abundant number, since it is smaller than the sum of its proper divisors (497681520).

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

207213840 is a wasteful number, since it uses less digits than its factorization.

207213840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741 (or 3732 counting only the distinct ones).

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

The square root of 207213840 is about 14394.9241053922. The cubic root of 207213840 is about 591.7517981936.

The spelling of 207213840 in words is "two hundred seven million, two hundred thirteen thousand, eight hundred forty".