988890 has 64 divisors (see below), whose sum is σ = 2882304. Its totient is φ = 211968.

The previous prime is 988877. The next prime is 988901. The reversal of 988890 is 98889.

988890 = T₂₂₀ + T₂₂₁ + ... + T₂₅₄.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3432 + ... + 3708.

It is an arithmetic number, because the mean of its divisors is an integer number (45036).

2⁹⁸⁸⁸⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 988890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1441152).

988890 is an abundant number, since it is smaller than the sum of its proper divisors (1893414).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

988890 is a wasteful number, since it uses less digits than its factorization.

988890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311.

The product of its (nonzero) digits is 41472, while the sum is 42.

The square root of 988890 is about 994.4294846795. The cubic root of 988890 is about 99.6282866707.

The spelling of 988890 in words is "nine hundred eighty-eight thousand, eight hundred ninety".