861093436 has 24 divisors (see below), whose sum is σ = 1751379840. Its totient is φ = 362784432.

The previous prime is 861093427. The next prime is 861093449. The reversal of 861093436 is 634390168.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258970 + ... + 262273.

It is an arithmetic number, because the mean of its divisors is an integer number (72974160).

Almost surely, 2^861093436 is an apocalyptic number.

It is an amenable number.

861093436 is an abundant number, since it is smaller than the sum of its proper divisors (890286404).

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

861093436 is a wasteful number, since it uses less digits than its factorization.

861093436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521313 (or 521311 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 861093436 is about 29344.3936042304. The cubic root of 861093436 is about 951.3714028791.

The spelling of 861093436 in words is "eight hundred sixty-one million, ninety-three thousand, four hundred thirty-six".