1456638 has 8 divisors (see below), whose sum is σ = 2913288. Its totient is φ = 485544.

The previous prime is 1456633. The next prime is 1456643. The reversal of 1456638 is 8366541.

It is an interprime number because it is at equal distance from previous prime (1456633) and next prime (1456643).

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

1456638 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1456599 and 1456608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1456633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121381 + ... + 121392.

It is an arithmetic number, because the mean of its divisors is an integer number (364161).

2^1456638 is an apocalyptic number.

1456638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1456638 is a wasteful number, since it uses less digits than its factorization.

1456638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242778.

The product of its digits is 17280, while the sum is 33.

The square root of 1456638 is about 1206.9125900412. The cubic root of 1456638 is about 113.3575745916.

Subtracting 1456638 from its reverse (8366541), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 1456638 in words is "one million, four hundred fifty-six thousand, six hundred thirty-eight".