207139740 has 24 divisors (see below), whose sum is σ = 579991440. Its totient is φ = 55237248.

The previous prime is 207139693. The next prime is 207139819. The reversal of 207139740 is 47931702.

207139740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1726105 + ... + 1726224.

It is an arithmetic number, because the mean of its divisors is an integer number (24166310).

Almost surely, 2^207139740 is an apocalyptic number.

207139740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

207139740 is an abundant number, since it is smaller than the sum of its proper divisors (372851700).

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

207139740 is a wasteful number, since it uses less digits than its factorization.

207139740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3452341 (or 3452339 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 207139740 is about 14392.3500513294. The cubic root of 207139740 is about 591.6812526546.

The spelling of 207139740 in words is "two hundred seven million, one hundred thirty-nine thousand, seven hundred forty".