538906690 has 64 divisors (see below), whose sum is σ = 1170627840. Its totient is φ = 174493440.

The previous prime is 538906679. The next prime is 538906723. The reversal of 538906690 is 96609835.

It is a super-2 number, since 2×538906690² = 580840841053512200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 538906690.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 814960 + ... + 815620.

It is an arithmetic number, because the mean of its divisors is an integer number (18291060).

Almost surely, 2^538906690 is an apocalyptic number.

538906690 is an abundant number, since it is smaller than the sum of its proper divisors (631721150).

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

538906690 is a wasteful number, since it uses less digits than its factorization.

538906690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 538906690 is about 23214.3638723959. The cubic root of 538906690 is about 813.7753396026.

The spelling of 538906690 in words is "five hundred thirty-eight million, nine hundred six thousand, six hundred ninety".