207828404 has 18 divisors (see below), whose sum is σ = 423079650. Its totient is φ = 89069232.

The previous prime is 207828389. The next prime is 207828409. The reversal of 207828404 is 404828702.

207828404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 203119504 + 4708900 = 14252^2 + 2170^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (207828409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 529979 + ... + 530370.

It is an arithmetic number, because the mean of its divisors is an integer number (23504425).

Almost surely, 2^207828404 is an apocalyptic number.

It is an amenable number.

207828404 is an abundant number, since it is smaller than the sum of its proper divisors (215251246).

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

207828404 is a wasteful number, since it uses less digits than its factorization.

207828404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060367 (or 1060358 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 207828404 is about 14416.2548534632. The cubic root of 207828404 is about 592.3362353696.

The spelling of 207828404 in words is "two hundred seven million, eight hundred twenty-eight thousand, four hundred four".