694814820 has 192 divisors, whose sum is σ = 2457133056. Its totient is φ = 142940160.

The previous prime is 694814779. The next prime is 694814821. The reversal of 694814820 is 28418496.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (694814821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 162105 + ... + 166335.

It is an arithmetic number, because the mean of its divisors is an integer number (12797568).

Almost surely, 2^694814820 is an apocalyptic number.

694814820 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 694814820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1228566528).

694814820 is an abundant number, since it is smaller than the sum of its proper divisors (1762318236).

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

694814820 is a wasteful number, since it uses less digits than its factorization.

694814820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290 (or 4288 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 694814820 is about 26359.3402800601. The cubic root of 694814820 is about 885.7062127751.

The spelling of 694814820 in words is "six hundred ninety-four million, eight hundred fourteen thousand, eight hundred twenty".