688472862 has 128 divisors (see below), whose sum is σ = 1807515648. Its totient is φ = 169603200.

The previous prime is 688472857. The next prime is 688472867. The reversal of 688472862 is 268274886.

It is an interprime number because it is at equal distance from previous prime (688472857) and next prime (688472867).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688472867) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 758613 + ... + 759519.

It is an arithmetic number, because the mean of its divisors is an integer number (14121216).

Almost surely, 2^688472862 is an apocalyptic number.

688472862 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 688472862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903757824).

688472862 is an abundant number, since it is smaller than the sum of its proper divisors (1119042786).

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

688472862 is a wasteful number, since it uses less digits than its factorization.

688472862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014.

The product of its digits is 2064384, while the sum is 51.

The square root of 688472862 is about 26238.7663963076. The cubic root of 688472862 is about 883.0031957071.

The spelling of 688472862 in words is "six hundred eighty-eight million, four hundred seventy-two thousand, eight hundred sixty-two".