680401920 has 176 divisors, whose sum is σ = 2374651008. Its totient is φ = 164904960.

The previous prime is 680401889. The next prime is 680401927. The reversal of 680401920 is 29104086.

It is a tau number, because it is divible by the number of its divisors (176).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680401927) 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, 166947 + ... + 170973.

Almost surely, 2^680401920 is an apocalyptic number.

680401920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 680401920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1187325504).

680401920 is an abundant number, since it is smaller than the sum of its proper divisors (1694249088).

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

680401920 is a wasteful number, since it uses less digits than its factorization.

680401920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066 (or 4048 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 680401920 is about 26084.5149466115. The cubic root of 680401920 is about 879.5391526403.

The spelling of 680401920 in words is "six hundred eighty million, four hundred one thousand, nine hundred twenty".