1988265 has 16 divisors (see below), whose sum is σ = 3221568. Its totient is φ = 1046976.

The previous prime is 1988263. The next prime is 1988267. The reversal of 1988265 is 5628891.

It is an interprime number because it is at equal distance from previous prime (1988263) and next prime (1988267).

It is not a de Polignac number, because 1988265 - 2¹ = 1988263 is a prime.

1988265 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1988263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447 + ... + 2043.

It is an arithmetic number, because the mean of its divisors is an integer number (201348).

2^1988265 is an apocalyptic number.

1988265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1988265 is a deficient number, since it is larger than the sum of its proper divisors (1233303).

1988265 is a wasteful number, since it uses less digits than its factorization.

1988265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688.

The product of its digits is 34560, while the sum is 39.

The square root of 1988265 is about 1410.0585094243. The cubic root of 1988265 is about 125.7452018980.

The spelling of 1988265 in words is "one million, nine hundred eighty-eight thousand, two hundred sixty-five".