2686378390 has 32 divisors (see below), whose sum is σ = 4936469760. Its totient is φ = 1052265600.

The previous prime is 2686378381. The next prime is 2686378391. The reversal of 2686378390 is 938736862.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2686378391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130075 + ... + 149305.

It is an arithmetic number, because the mean of its divisors is an integer number (154264680).

Almost surely, 2^2686378390 is an apocalyptic number.

2686378390 is a deficient number, since it is larger than the sum of its proper divisors (2250091370).

2686378390 is a wasteful number, since it uses less digits than its factorization.

2686378390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19528.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The square root of 2686378390 is about 51830.2844869677. The cubic root of 2686378390 is about 1390.1310005410.

The spelling of 2686378390 in words is "two billion, six hundred eighty-six million, three hundred seventy-eight thousand, three hundred ninety".