2115428 has 36 divisors (see below), whose sum is σ = 4424112. Its totient is φ = 882000.

The previous prime is 2115427. The next prime is 2115431. The reversal of 2115428 is 8245112.

It is not an unprimeable number, because it can be changed into a prime (2115427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8303 + ... + 8553.

It is an arithmetic number, because the mean of its divisors is an integer number (122892).

2^2115428 is an apocalyptic number.

2115428 is a gapful number since it is divisible by the number (28) 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 2115428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2212056).

2115428 is an abundant number, since it is smaller than the sum of its proper divisors (2308684).

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

2115428 is a wasteful number, since it uses less digits than its factorization.

2115428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 303 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 2115428 is about 1454.4510992123. The cubic root of 2115428 is about 128.3707512562.

The spelling of 2115428 in words is "two million, one hundred fifteen thousand, four hundred twenty-eight".