689283990 has 48 divisors (see below), whose sum is σ = 1805251968. Its totient is φ = 182464128.

The previous prime is 689283979. The next prime is 689284009. The reversal of 689283990 is 99382986.

It is a super-2 number, since 2×689283990² = 950224837740640200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15622 + ... + 40281.

It is an arithmetic number, because the mean of its divisors is an integer number (37609416).

Almost surely, 2^689283990 is an apocalyptic number.

689283990 is an abundant number, since it is smaller than the sum of its proper divisors (1115967978).

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

689283990 is a wasteful number, since it uses less digits than its factorization.

689283990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56053 (or 56050 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The square root of 689283990 is about 26254.2185181734. The cubic root of 689283990 is about 883.3498312650.

The spelling of 689283990 in words is "six hundred eighty-nine million, two hundred eighty-three thousand, nine hundred ninety".