689062500 has 243 divisors, whose sum is σ = 2532713547. Its totient is φ = 157500000.

The previous prime is 689062483. The next prime is 689062571. The reversal of 689062500 is 5260986.

The square root of 689062500 is 26250.

It is a perfect power (a square), and thus also a powerful number.

689062500 is a `hidden beast` number, since 6 + 8 + 90 + 62 + 500 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 489913956 + 199148544 = 22134^2 + 14112^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 98437497 + ... + 98437503.

Almost surely, 2^689062500 is an apocalyptic number.

689062500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

689062500 is the 26250-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689062500

689062500 is an abundant number, since it is smaller than the sum of its proper divisors (1843651047).

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

689062500 is an frugal number, since it uses more digits than its factorization.

689062500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The cubic root of 689062500 is about 883.2552045135.

Multiplying 689062500 by its sum of digits (36), we get a square (24806250000 = 157500²).

689062500 divided by its sum of digits (36) gives a square (19140625 = 4375²).

The spelling of 689062500 in words is "six hundred eighty-nine million, sixty-two thousand, five hundred".