864478737 has 20 divisors (see below), whose sum is σ = 1293289140. Its totient is φ = 575468064.

The previous prime is 864478723. The next prime is 864478753. The reversal of 864478737 is 737874468.

It can be written as a sum of positive squares in 2 ways, for example, as 501804801 + 362673936 = 22401^2 + 19044^2 .

It is not a de Polignac number, because 864478737 - 2⁴ = 864478721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864478757) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 49903 + ... + 64955.

It is an arithmetic number, because the mean of its divisors is an integer number (64664457).

Almost surely, 2^864478737 is an apocalyptic number.

It is an amenable number.

864478737 is a deficient number, since it is larger than the sum of its proper divisors (428810403).

864478737 is a wasteful number, since it uses less digits than its factorization.

864478737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15774 (or 15765 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 54.

The square root of 864478737 is about 29402.0192673905. The cubic root of 864478737 is about 952.6165125003.

The spelling of 864478737 in words is "eight hundred sixty-four million, four hundred seventy-eight thousand, seven hundred thirty-seven".