1056638 has 8 divisors (see below), whose sum is σ = 1729080. Its totient is φ = 480280.

The previous prime is 1056623. The next prime is 1056641. The reversal of 1056638 is 8366501.

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

It is a super-2 number, since 2×1056638² = 2232967726088, 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 1056638.

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, 23993 + ... + 24036.

It is an arithmetic number, because the mean of its divisors is an integer number (216135).

2^1056638 is an apocalyptic number.

1056638 is a deficient number, since it is larger than the sum of its proper divisors (672442).

1056638 is a wasteful number, since it uses less digits than its factorization.

1056638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48042.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1056638 is about 1027.9289858740. The cubic root of 1056638 is about 101.8533712725.

The spelling of 1056638 in words is "one million, fifty-six thousand, six hundred thirty-eight".