4651638 has 8 divisors (see below), whose sum is σ = 9303288. Its totient is φ = 1550544.

The previous prime is 4651607. The next prime is 4651639. The reversal of 4651638 is 8361564.

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

4651638 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 4651599 and 4651608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4651639) 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, 387631 + ... + 387642.

It is an arithmetic number, because the mean of its divisors is an integer number (1162911).

Almost surely, 2^4651638 is an apocalyptic number.

4651638 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.

4651638 is a wasteful number, since it uses less digits than its factorization.

4651638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775278.

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

The square root of 4651638 is about 2156.7656339992. The cubic root of 4651638 is about 166.9303497186.

The spelling of 4651638 in words is "four million, six hundred fifty-one thousand, six hundred thirty-eight".