208280627540 has 24 divisors (see below), whose sum is σ = 463118101992. Its totient is φ = 78411530240.

The previous prime is 208280627483. The next prime is 208280627549. The reversal of 208280627540 is 45726082802.

It can be written as a sum of positive squares in 4 ways, for example, as 10502970256 + 197777657284 = 102484^2 + 444722^2 .

It is a junction number, because it is equal to n+sod(n) for n = 208280627491 and 208280627500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208280627549) 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, 306294701 + ... + 306295380.

It is an arithmetic number, because the mean of its divisors is an integer number (19296587583).

Almost surely, 2^208280627540 is an apocalyptic number.

208280627540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208280627540 is an abundant number, since it is smaller than the sum of its proper divisors (254837474452).

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

208280627540 is a wasteful number, since it uses less digits than its factorization.

208280627540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612590107 (or 612590105 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 44.

The spelling of 208280627540 in words is "two hundred eight billion, two hundred eighty million, six hundred twenty-seven thousand, five hundred forty".