676989780 has 96 divisors (see below), whose sum is σ = 1974647808. Its totient is φ = 173107200.

The previous prime is 676989743. The next prime is 676989787. The reversal of 676989780 is 87989676.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (676989787) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208570 + ... + 211790.

It is an arithmetic number, because the mean of its divisors is an integer number (20569248).

Almost surely, 2^676989780 is an apocalyptic number.

676989780 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 676989780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (987323904).

676989780 is an abundant number, since it is smaller than the sum of its proper divisors (1297658028).

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

676989780 is a wasteful number, since it uses less digits than its factorization.

676989780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377 (or 3375 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 60.

The square root of 676989780 is about 26019.0272685202. The cubic root of 676989780 is about 878.0664243379.

The spelling of 676989780 in words is "six hundred seventy-six million, nine hundred eighty-nine thousand, seven hundred eighty".