2638436 has 6 divisors (see below), whose sum is σ = 4617270. Its totient is φ = 1319216.

The previous prime is 2638411. The next prime is 2638469. The reversal of 2638436 is 6348362.

It can be written as a sum of positive squares in only one way, i.e., 1577536 + 1060900 = 1256^2 + 1030^2 .

It is a super-2 number, since 2×2638436² = 13922689052192, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2²¹ + 6⁴ + 3⁵ + 8³ + 4² + 3¹² + 6⁵ .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329801 + ... + 329808.

It is an arithmetic number, because the mean of its divisors is an integer number (769545).

2^2638436 is an apocalyptic number.

It is an amenable number.

2638436 is a deficient number, since it is larger than the sum of its proper divisors (1978834).

2638436 is a wasteful number, since it uses less digits than its factorization.

2638436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659613 (or 659611 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 2638436 is about 1624.3263218947. The cubic root of 2638436 is about 138.1811665272.

The spelling of 2638436 in words is "two million, six hundred thirty-eight thousand, four hundred thirty-six".