2638990548 has 18 divisors (see below), whose sum is σ = 6670781754. Its totient is φ = 879663504.

The previous prime is 2638990547. The next prime is 2638990567. The reversal of 2638990548 is 8450998362.

2638990548 is a `hidden beast` number, since 2 + 6 + 3 + 8 + 9 + 90 + 548 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2538950544 + 100040004 = 50388^2 + 10002^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×2638990548² = 13928542224866680608, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2638990494 and 2638990503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638990547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36652611 + ... + 36652682.

Almost surely, 2^2638990548 is an apocalyptic number.

It is an amenable number.

2638990548 is an abundant number, since it is smaller than the sum of its proper divisors (4031791206).

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

2638990548 is a wasteful number, since it uses less digits than its factorization.

2638990548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73305303 (or 73305298 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The square root of 2638990548 is about 51371.1061590073. The cubic root of 2638990548 is about 1381.9084684810.

The spelling of 2638990548 in words is "two billion, six hundred thirty-eight million, nine hundred ninety thousand, five hundred forty-eight".