4621890 has 64 divisors (see below), whose sum is σ = 13660416. Its totient is φ = 974592.

The previous prime is 4621867. The next prime is 4621891. The reversal of 4621890 is 981264.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4621891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1884 + ... + 3576.

It is an arithmetic number, because the mean of its divisors is an integer number (213444).

Almost surely, 2^4621890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4621890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6830208).

4621890 is an abundant number, since it is smaller than the sum of its proper divisors (9038526).

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

4621890 is a wasteful number, since it uses less digits than its factorization.

4621890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 4621890 is about 2149.8581348545. The cubic root of 4621890 is about 166.5737393078.

The spelling of 4621890 in words is "four million, six hundred twenty-one thousand, eight hundred ninety".