2154788 has 6 divisors (see below), whose sum is σ = 3770886. Its totient is φ = 1077392.

The previous prime is 2154749. The next prime is 2154791. The reversal of 2154788 is 8874512.

It can be written as a sum of positive squares in only one way, i.e., 1170724 + 984064 = 1082^2 + 992^2 .

It is a super-2 number, since 2×2154788² = 9286222649888, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269345 + ... + 269352.

It is an arithmetic number, because the mean of its divisors is an integer number (628481).

2^2154788 is an apocalyptic number.

It is an amenable number.

2154788 is a deficient number, since it is larger than the sum of its proper divisors (1616098).

2154788 is a wasteful number, since it uses less digits than its factorization.

2154788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538701 (or 538699 counting only the distinct ones).

The product of its digits is 17920, while the sum is 35.

The square root of 2154788 is about 1467.9196163278. The cubic root of 2154788 is about 129.1620262410.

The spelling of 2154788 in words is "two million, one hundred fifty-four thousand, seven hundred eighty-eight".