2147661340 has 96 divisors (see below), whose sum is σ = 5436232704. Its totient is φ = 703042560.

The previous prime is 2147661331. The next prime is 2147661353. The reversal of 2147661340 is 431667412.

It is a super-2 number, since 2×2147661340² = 9224898462661191200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 2147661296 and 2147661305.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73537 + ... + 98503.

It is an arithmetic number, because the mean of its divisors is an integer number (56627424).

Almost surely, 2^2147661340 is an apocalyptic number.

2147661340 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 2147661340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2718116352).

2147661340 is an abundant number, since it is smaller than the sum of its proper divisors (3288571364).

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

2147661340 is a wasteful number, since it uses less digits than its factorization.

2147661340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25027 (or 25025 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 2147661340 is about 46342.8671965816. The cubic root of 2147661340 is about 1290.1947385434.

The spelling of 2147661340 in words is "two billion, one hundred forty-seven million, six hundred sixty-one thousand, three hundred forty".