689292450 has 384 divisors, whose sum is σ = 2499840000. Its totient is φ = 135302400.

The previous prime is 689292433. The next prime is 689292463. The reversal of 689292450 is 54292986.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 689292396 and 689292405.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1974876 + ... + 1975224.

It is an arithmetic number, because the mean of its divisors is an integer number (6510000).

Almost surely, 2^689292450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 689292450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1249920000).

689292450 is an abundant number, since it is smaller than the sum of its proper divisors (1810547550).

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

689292450 is a wasteful number, since it uses less digits than its factorization.

689292450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 689292450 is about 26254.3796346438. The cubic root of 689292450 is about 883.3534452127.

The spelling of 689292450 in words is "six hundred eighty-nine million, two hundred ninety-two thousand, four hundred fifty".