2157948 has 96 divisors (see below), whose sum is σ = 6350400. Its totient is φ = 628992.

The previous prime is 2157923. The next prime is 2157989. The reversal of 2157948 is 8497512.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40690 + ... + 40742.

It is an arithmetic number, because the mean of its divisors is an integer number (66150).

2^2157948 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 2157948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3175200).

2157948 is an abundant number, since it is smaller than the sum of its proper divisors (4192452).

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

2157948 is a wasteful number, since it uses less digits than its factorization.

2157948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108 (or 100 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 2157948 is about 1468.9955752146. The cubic root of 2157948 is about 129.2251341734.

The spelling of 2157948 in words is "two million, one hundred fifty-seven thousand, nine hundred forty-eight".