208830740 has 24 divisors (see below), whose sum is σ = 453668040. Its totient is φ = 80651648.

The previous prime is 208830719. The next prime is 208830763. The reversal of 208830740 is 47038802.

It can be written as a sum of positive squares in 4 ways, for example, as 45859984 + 162970756 = 6772^2 + 12766^2 .

It is a super-2 number, since 2×208830740² = 87220555937895200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 208830697 and 208830706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179447 + ... + 180606.

It is an arithmetic number, because the mean of its divisors is an integer number (18902835).

Almost surely, 2^208830740 is an apocalyptic number.

208830740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208830740 is an abundant number, since it is smaller than the sum of its proper divisors (244837300).

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

208830740 is a wasteful number, since it uses less digits than its factorization.

208830740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360091 (or 360089 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 208830740 is about 14450.9771295923. The cubic root of 208830740 is about 593.2869684204.

The spelling of 208830740 in words is "two hundred eight million, eight hundred thirty thousand, seven hundred forty".