689694824 has 32 divisors (see below), whose sum is σ = 1591605120. Its totient is φ = 272846016.

The previous prime is 689694823. The next prime is 689694827. The reversal of 689694824 is 428496986.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a self number, because there is not a number n which added to its sum of digits gives 689694824.

It is not an unprimeable number, because it can be changed into a prime (689694823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472964 + ... + 474419.

It is an arithmetic number, because the mean of its divisors is an integer number (49737660).

Almost surely, 2^689694824 is an apocalyptic number.

It is an amenable number.

689694824 is an abundant number, since it is smaller than the sum of its proper divisors (901910296).

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

689694824 is a wasteful number, since it uses less digits than its factorization.

689694824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947409 (or 947405 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 56.

The square root of 689694824 is about 26262.0415048031. The cubic root of 689694824 is about 883.5252974356.

The spelling of 689694824 in words is "six hundred eighty-nine million, six hundred ninety-four thousand, eight hundred twenty-four".