2636478460 has 96 divisors (see below), whose sum is σ = 6927524352. Its totient is φ = 818814720.

The previous prime is 2636478457. The next prime is 2636478461. The reversal of 2636478460 is 648746362.

It is a self number, because there is not a number n which added to its sum of digits gives 2636478460.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2636478461) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 448299 + ... + 454141.

It is an arithmetic number, because the mean of its divisors is an integer number (72161712).

Almost surely, 2^2636478460 is an apocalyptic number.

2636478460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2636478460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3463762176).

2636478460 is an abundant number, since it is smaller than the sum of its proper divisors (4291045892).

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

2636478460 is a wasteful number, since it uses less digits than its factorization.

2636478460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6163 (or 6161 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 46.

The square root of 2636478460 is about 51346.6499394070. The cubic root of 2636478460 is about 1381.4698439749.

The spelling of 2636478460 in words is "two billion, six hundred thirty-six million, four hundred seventy-eight thousand, four hundred sixty".