2647528380 has 72 divisors (see below), whose sum is σ = 9178102752. Its totient is φ = 605149056.

The previous prime is 2647528339. The next prime is 2647528391. The reversal of 2647528380 is 838257462.

2647528380 is a `hidden beast` number, since 2 + 6 + 47 + 528 + 3 + 80 = 666.

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

It is a congruent number.

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, 1049347 + ... + 1051866.

Almost surely, 2^2647528380 is an apocalyptic number.

2647528380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2647528380 is an abundant number, since it is smaller than the sum of its proper divisors (6530574372).

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

2647528380 is a wasteful number, since it uses less digits than its factorization.

2647528380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2101235 (or 2101230 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 2647528380 is about 51454.1386090565. The cubic root of 2647528380 is about 1383.3971439412.

The spelling of 2647528380 in words is "two billion, six hundred forty-seven million, five hundred twenty-eight thousand, three hundred eighty".