861093428 has 12 divisors (see below), whose sum is σ = 1622830020. Its totient is φ = 397427712.

The previous prime is 861093427. The next prime is 861093449. The reversal of 861093428 is 824390168.

It can be written as a sum of positive squares in 2 ways, for example, as 259274404 + 601819024 = 16102^2 + 24532^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861093421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8279693 + ... + 8279796.

It is an arithmetic number, because the mean of its divisors is an integer number (135235835).

Almost surely, 2^861093428 is an apocalyptic number.

It is an amenable number.

861093428 is a deficient number, since it is larger than the sum of its proper divisors (761736592).

861093428 is a wasteful number, since it uses less digits than its factorization.

861093428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16559506 (or 16559504 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 861093428 is about 29344.3934679182. The cubic root of 861093428 is about 951.3713999328.

The spelling of 861093428 in words is "eight hundred sixty-one million, ninety-three thousand, four hundred twenty-eight".