2638450004 has 6 divisors (see below), whose sum is σ = 4617287514. Its totient is φ = 1319225000.

The previous prime is 2638449941. The next prime is 2638450007. The reversal of 2638450004 is 4000548362.

It can be written as a sum of positive squares in only one way, i.e., 1588819600 + 1049630404 = 39860^2 + 32398^2 .

It is a super-2 number, since 2×2638450004² = 13922836847215200032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638450007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329806247 + ... + 329806254.

It is an arithmetic number, because the mean of its divisors is an integer number (769547919).

Almost surely, 2^2638450004 is an apocalyptic number.

It is an amenable number.

2638450004 is a deficient number, since it is larger than the sum of its proper divisors (1978837510).

2638450004 is a wasteful number, since it uses less digits than its factorization.

2638450004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659612505 (or 659612503 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 2638450004 is about 51365.8447219551. The cubic root of 2638450004 is about 1381.8141100101.

Adding to 2638450004 its reverse (4000548362), we get a palindrome (6638998366).

The spelling of 2638450004 in words is "two billion, six hundred thirty-eight million, four hundred fifty thousand, four".