1984155 has 32 divisors (see below), whose sum is σ = 3483648. Its totient is φ = 960000.

The previous prime is 1984139. The next prime is 1984159. The reversal of 1984155 is 5514891.

It is not a de Polignac number, because 1984155 - 2⁴ = 1984139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1984159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7780 + ... + 8030.

It is an arithmetic number, because the mean of its divisors is an integer number (108864).

2^1984155 is an apocalyptic number.

1984155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1984155 is a deficient number, since it is larger than the sum of its proper divisors (1499493).

1984155 is a wasteful number, since it uses less digits than its factorization.

1984155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307.

The product of its digits is 7200, while the sum is 33.

The square root of 1984155 is about 1408.6003691608. The cubic root of 1984155 is about 125.6584982820.

The spelling of 1984155 in words is "one million, nine hundred eighty-four thousand, one hundred fifty-five".