2078309766 has 32 divisors (see below), whose sum is σ = 4630721760. Its totient is φ = 617428224.

The previous prime is 2078309747. The next prime is 2078309767. The reversal of 2078309766 is 6679038702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2078309767) 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, 457135 + ... + 461658.

It is an arithmetic number, because the mean of its divisors is an integer number (144710055).

Almost surely, 2^2078309766 is an apocalyptic number.

2078309766 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2078309766 is an abundant number, since it is smaller than the sum of its proper divisors (2552411994).

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

2078309766 is a wasteful number, since it uses less digits than its factorization.

2078309766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918840.

The product of its (nonzero) digits is 762048, while the sum is 48.

The square root of 2078309766 is about 45588.4828218707. The cubic root of 2078309766 is about 1276.1549992199.

The spelling of 2078309766 in words is "two billion, seventy-eight million, three hundred nine thousand, seven hundred sixty-six".