2157748 has 24 divisors (see below), whose sum is σ = 3951360. Its totient is φ = 1030080.

The previous prime is 2157739. The next prime is 2157763. The reversal of 2157748 is 8477512.

It is a happy number.

2157748 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9565 + ... + 9787.

It is an arithmetic number, because the mean of its divisors is an integer number (164640).

2^2157748 is an apocalyptic number.

It is an amenable number.

2157748 is a deficient number, since it is larger than the sum of its proper divisors (1793612).

2157748 is a wasteful number, since it uses less digits than its factorization.

2157748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327 (or 325 counting only the distinct ones).

The product of its digits is 15680, while the sum is 34.

The square root of 2157748 is about 1468.9274999128. The cubic root of 2157748 is about 129.2211418274.

The spelling of 2157748 in words is "two million, one hundred fifty-seven thousand, seven hundred forty-eight".