2699071380 has 72 divisors (see below), whose sum is σ = 8216891592. Its totient is φ = 717140736.

The previous prime is 2699071339. The next prime is 2699071381. The reversal of 2699071380 is 831709962.

2699071380 is a `hidden beast` number, since 269 + 9 + 0 + 7 + 1 + 380 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 145588356 + 2553483024 = 12066^2 + 50532^2 .

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 (2699071381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22794 + ... + 76926.

Almost surely, 2^2699071380 is an apocalyptic number.

2699071380 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 2699071380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4108445796).

2699071380 is an abundant number, since it is smaller than the sum of its proper divisors (5517820212).

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

2699071380 is a wasteful number, since it uses less digits than its factorization.

2699071380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54425 (or 54420 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 2699071380 is about 51952.5878085009. The cubic root of 2699071380 is about 1392.3169920666.

The spelling of 2699071380 in words is "two billion, six hundred ninety-nine million, seventy-one thousand, three hundred eighty".