2421738 has 56 divisors (see below), whose sum is σ = 5980896. Its totient is φ = 729000.

The previous prime is 2421737. The next prime is 2421743. The reversal of 2421738 is 8371242.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2421733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 15963 + ... + 16113.

2^2421738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2421738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2990448).

2421738 is an abundant number, since it is smaller than the sum of its proper divisors (3559158).

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

2421738 is a wasteful number, since it uses less digits than its factorization.

2421738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 167 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2421738 is about 1556.1934327069. The cubic root of 2421738 is about 134.2896016249.

The spelling of 2421738 in words is "two million, four hundred twenty-one thousand, seven hundred thirty-eight".