531769890 has 64 divisors (see below), whose sum is σ = 1334797056. Its totient is φ = 135328512.

The previous prime is 531769837. The next prime is 531769921. The reversal of 531769890 is 98967135.

It is a super-2 number, since 2×531769890² = 565558431821224200, which contains 22 as substring.

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, 532872 + ... + 533868.

It is an arithmetic number, because the mean of its divisors is an integer number (20856204).

Almost surely, 2^531769890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531769890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (667398528).

531769890 is an abundant number, since it is smaller than the sum of its proper divisors (803027166).

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

531769890 is a wasteful number, since it uses less digits than its factorization.

531769890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1803.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 531769890 is about 23060.1363829445. The cubic root of 531769890 is about 810.1670589733.

The spelling of 531769890 in words is "five hundred thirty-one million, seven hundred sixty-nine thousand, eight hundred ninety".