689902920 has 320 divisors, whose sum is σ = 2791324800. Its totient is φ = 149299200.

The previous prime is 689902909. The next prime is 689902931. The reversal of 689902920 is 29209986.

It is an interprime number because it is at equal distance from previous prime (689902909) and next prime (689902931).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 430120 + ... + 431720.

It is an arithmetic number, because the mean of its divisors is an integer number (8722890).

Almost surely, 2^689902920 is an apocalyptic number.

689902920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689902920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1395662400).

689902920 is an abundant number, since it is smaller than the sum of its proper divisors (2101421880).

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

689902920 is a wasteful number, since it uses less digits than its factorization.

689902920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 689902920 is about 26266.0031219065. The cubic root of 689902920 is about 883.6141481300.

The spelling of 689902920 in words is "six hundred eighty-nine million, nine hundred two thousand, nine hundred twenty".