1988929 has 8 divisors (see below), whose sum is σ = 2080512. Its totient is φ = 1899120.

The previous prime is 1988897. The next prime is 1988933. The reversal of 1988929 is 9298891.

1988929 = T₁₁₅₀ + T₁₁₅₁ + T₁₁₅₂.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1988929 - 2⁵ = 1988897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1988999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2187 + ... + 2959.

It is an arithmetic number, because the mean of its divisors is an integer number (260064).

2^1988929 is an apocalyptic number.

1988929 is the 1152-nd centered triangular number.

It is an amenable number.

1988929 is a deficient number, since it is larger than the sum of its proper divisors (91583).

1988929 is an equidigital number, since it uses as much as digits as its factorization.

1988929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887.

The product of its digits is 93312, while the sum is 46.

The square root of 1988929 is about 1410.2939409924. The cubic root of 1988929 is about 125.7591982753.

The spelling of 1988929 in words is "one million, nine hundred eighty-eight thousand, nine hundred twenty-nine".