2154638 has 8 divisors (see below), whose sum is σ = 3402120. Its totient is φ = 1020600.

The previous prime is 2154629. The next prime is 2154641. The reversal of 2154638 is 8364512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2154638² = 9284929822088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2154638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28313 + ... + 28388.

It is an arithmetic number, because the mean of its divisors is an integer number (425265).

2^2154638 is an apocalyptic number.

2154638 is a deficient number, since it is larger than the sum of its proper divisors (1247482).

2154638 is a wasteful number, since it uses less digits than its factorization.

2154638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56722.

The product of its digits is 5760, while the sum is 29.

The square root of 2154638 is about 1467.8685227227. The cubic root of 2154638 is about 129.1590290778.

The spelling of 2154638 in words is "two million, one hundred fifty-four thousand, six hundred thirty-eight".