698457820 has 24 divisors (see below), whose sum is σ = 1467610704. Its totient is φ = 279221376.

The previous prime is 698457817. The next prime is 698457827. The reversal of 698457820 is 28754896.

It is a super-4 number, since 4×698457820⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (698457827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28984 + ... + 47296.

It is an arithmetic number, because the mean of its divisors is an integer number (61150446).

Almost surely, 2^698457820 is an apocalyptic number.

It is an amenable number.

698457820 is an abundant number, since it is smaller than the sum of its proper divisors (769152884).

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

698457820 is a wasteful number, since it uses less digits than its factorization.

698457820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20229 (or 20227 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 698457820 is about 26428.3525782444. The cubic root of 698457820 is about 887.2514709776.

The spelling of 698457820 in words is "six hundred ninety-eight million, four hundred fifty-seven thousand, eight hundred twenty".