2147649280 has 144 divisors (see below), whose sum is σ = 5907029184. Its totient is φ = 732856320.

The previous prime is 2147649263. The next prime is 2147649379. The reversal of 2147649280 is 829467412.

It is a super-2 number, since 2×2147649280² = 9224794859769036800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2517334 + ... + 2518186.

It is an arithmetic number, because the mean of its divisors is an integer number (41021036).

Almost surely, 2^2147649280 is an apocalyptic number.

2147649280 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 2147649280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2953514592).

2147649280 is an abundant number, since it is smaller than the sum of its proper divisors (3759379904).

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

2147649280 is an equidigital number, since it uses as much as digits as its factorization.

2147649280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 1148 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 2147649280 is about 46342.7370792878. The cubic root of 2147649280 is about 1290.1923235479.

It can be divided in two parts, 21476 and 49280, that added together give a square (70756 = 266²).

The spelling of 2147649280 in words is "two billion, one hundred forty-seven million, six hundred forty-nine thousand, two hundred eighty".