8401620 has 48 divisors (see below), whose sum is σ = 24288768. Its totient is φ = 2167680.

The previous prime is 8401573. The next prime is 8401633. The reversal of 8401620 is 261048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399 + ... + 4118.

It is an arithmetic number, because the mean of its divisors is an integer number (506016).

Almost surely, 2^8401620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8401620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12144384).

8401620 is an abundant number, since it is smaller than the sum of its proper divisors (15887148).

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

8401620 is a wasteful number, since it uses less digits than its factorization.

8401620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4560 (or 4558 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 8401620 is about 2898.5548123160. The cubic root of 8401620 is about 203.2923384761.

Adding to 8401620 its reverse (261048), we get a palindrome (8662668).

The spelling of 8401620 in words is "eight million, four hundred one thousand, six hundred twenty".