207444138 has 32 divisors (see below), whose sum is σ = 453219840. Its totient is φ = 62776560.

The previous prime is 207444121. The next prime is 207444151. The reversal of 207444138 is 831444702.

207444138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 207444099 and 207444108.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60843 + ... + 64161.

It is an arithmetic number, because the mean of its divisors is an integer number (14163120).

Almost surely, 2^207444138 is an apocalyptic number.

207444138 is an abundant number, since it is smaller than the sum of its proper divisors (245775702).

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

207444138 is a wasteful number, since it uses less digits than its factorization.

207444138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 207444138 is about 14402.9211620421. The cubic root of 207444138 is about 591.9709418565.

The spelling of 207444138 in words is "two hundred seven million, four hundred forty-four thousand, one hundred thirty-eight".