861247476 has 36 divisors (see below), whose sum is σ = 2230144644. Its totient is φ = 280080000.

The previous prime is 861247469. The next prime is 861247511. The reversal of 861247476 is 674742168.

It can be written as a sum of positive squares in 2 ways, for example, as 356076900 + 505170576 = 18870^2 + 22476^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 290275 + ... + 293226.

Almost surely, 2^861247476 is an apocalyptic number.

It is an amenable number.

861247476 is an abundant number, since it is smaller than the sum of its proper divisors (1368897168).

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

861247476 is a wasteful number, since it uses less digits than its factorization.

861247476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583552 (or 583547 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 861247476 is about 29347.0181790246. The cubic root of 861247476 is about 951.4281294033.

The spelling of 861247476 in words is "eight hundred sixty-one million, two hundred forty-seven thousand, four hundred seventy-six".