1634868 has 18 divisors (see below), whose sum is σ = 4132674. Its totient is φ = 544944.

The previous prime is 1634849. The next prime is 1634869. The reversal of 1634868 is 8684361.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 898704 + 736164 = 948^2 + 858^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 45413 = 1634868 / (1 + 6 + 3 + 4 + 8 + 6 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1634869) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22671 + ... + 22742.

It is an arithmetic number, because the mean of its divisors is an integer number (229593).

2^1634868 is an apocalyptic number.

1634868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1634868 is an abundant number, since it is smaller than the sum of its proper divisors (2497806).

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

1634868 is a wasteful number, since it uses less digits than its factorization.

1634868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45423 (or 45418 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 1634868 is about 1278.6195681281. The cubic root of 1634868 is about 117.8042334726.

The spelling of 1634868 in words is "one million, six hundred thirty-four thousand, eight hundred sixty-eight".