2686400478 has 24 divisors (see below), whose sum is σ = 6036110808. Its totient is φ = 895466664.

The previous prime is 2686400477. The next prime is 2686400489. The reversal of 2686400478 is 8740046862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2686400473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2763301 + ... + 2764272.

It is an arithmetic number, because the mean of its divisors is an integer number (251504617).

Almost surely, 2^2686400478 is an apocalyptic number.

2686400478 is an abundant number, since it is smaller than the sum of its proper divisors (3349710330).

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

2686400478 is an equidigital number, since it uses as much as digits as its factorization.

2686400478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5527590 (or 5527578 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The square root of 2686400478 is about 51830.4975665872. The cubic root of 2686400478 is about 1390.1348105192.

The spelling of 2686400478 in words is "two billion, six hundred eighty-six million, four hundred thousand, four hundred seventy-eight".