2693438640 has 120 divisors (see below), whose sum is σ = 9160157760. Its totient is φ = 709143552.

The previous prime is 2693438623. The next prime is 2693438653. The reversal of 2693438640 is 468343962.

2693438640 is a `hidden beast` number, since 269 + 3 + 4 + 386 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×2693438640² = 14509223414890099200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33204 + ... + 80556.

It is an arithmetic number, because the mean of its divisors is an integer number (76334648).

Almost surely, 2^2693438640 is an apocalyptic number.

2693438640 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 2693438640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4580078880).

2693438640 is an abundant number, since it is smaller than the sum of its proper divisors (6466719120).

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

2693438640 is a wasteful number, since it uses less digits than its factorization.

2693438640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47451 (or 47442 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The square root of 2693438640 is about 51898.3491066912. The cubic root of 2693438640 is about 1391.3477671697.

The spelling of 2693438640 in words is "two billion, six hundred ninety-three million, four hundred thirty-eight thousand, six hundred forty".