688503480 has 64 divisors (see below), whose sum is σ = 2360586240. Its totient is φ = 157372032.

The previous prime is 688503461. The next prime is 688503481. The reversal of 688503480 is 84305886.

It is a super-2 number, since 2×688503480² = 948074083944220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688503481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 408984 + ... + 410663.

It is an arithmetic number, because the mean of its divisors is an integer number (36884160).

Almost surely, 2^688503480 is an apocalyptic number.

688503480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

688503480 is an abundant number, since it is smaller than the sum of its proper divisors (1672082760).

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

688503480 is a wasteful number, since it uses less digits than its factorization.

688503480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819668 (or 819664 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 42.

The square root of 688503480 is about 26239.3498395063. The cubic root of 688503480 is about 883.0162852528.

The spelling of 688503480 in words is "six hundred eighty-eight million, five hundred three thousand, four hundred eighty".