680993428 has 12 divisors (see below), whose sum is σ = 1232833140. Its totient is φ = 328755392.

The previous prime is 680993419. The next prime is 680993437. The reversal of 680993428 is 824399086.

It is an interprime number because it is at equal distance from previous prime (680993419) and next prime (680993437).

It can be written as a sum of positive squares in 2 ways, for example, as 135210384 + 545783044 = 11628^2 + 23362^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2935201 + ... + 2935432.

It is an arithmetic number, because the mean of its divisors is an integer number (102736095).

Almost surely, 2^680993428 is an apocalyptic number.

It is an amenable number.

680993428 is a deficient number, since it is larger than the sum of its proper divisors (551839712).

680993428 is a wasteful number, since it uses less digits than its factorization.

680993428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5870666 (or 5870664 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 680993428 is about 26095.8507813024. The cubic root of 680993428 is about 879.7939548591.

The spelling of 680993428 in words is "six hundred eighty million, nine hundred ninety-three thousand, four hundred twenty-eight".