65478870 has 48 divisors (see below), whose sum is σ = 170662752. Its totient is φ = 17418240.

The previous prime is 65478859. The next prime is 65478871. The reversal of 65478870 is 7887456.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65478871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56214 + ... + 57366.

It is an arithmetic number, because the mean of its divisors is an integer number (3555474).

Almost surely, 2^65478870 is an apocalyptic number.

65478870 is an abundant number, since it is smaller than the sum of its proper divisors (105183882).

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

65478870 is a wasteful number, since it uses less digits than its factorization.

65478870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1797 (or 1794 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 65478870 is about 8091.9015070625. The cubic root of 65478870 is about 403.0575481159.

It can be divided in two parts, 654 and 78870, that added together give a square (79524 = 282²).

The spelling of 65478870 in words is "sixty-five million, four hundred seventy-eight thousand, eight hundred seventy".