2391620 has 48 divisors (see below), whose sum is σ = 6265728. Its totient is φ = 744960.

The previous prime is 2391589. The next prime is 2391629. The reversal of 2391620 is 261932.

It is not an unprimeable number, because it can be changed into a prime (2391629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 764 + ... + 2316.

It is an arithmetic number, because the mean of its divisors is an integer number (130536).

2^2391620 is an apocalyptic number.

2391620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2391620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3132864).

2391620 is an abundant number, since it is smaller than the sum of its proper divisors (3874108).

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

2391620 is a wasteful number, since it uses less digits than its factorization.

2391620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 2391620 is about 1546.4863400625. The cubic root of 2391620 is about 133.7305791815.

The spelling of 2391620 in words is "two million, three hundred ninety-one thousand, six hundred twenty".