208620690 has 16 divisors (see below), whose sum is σ = 500689728. Its totient is φ = 55632176.

The previous prime is 208620677. The next prime is 208620691. The reversal of 208620690 is 96026802.

208620690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×208620690² = 87045184592152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (208620691) 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, 3476982 + ... + 3477041.

It is an arithmetic number, because the mean of its divisors is an integer number (31293108).

Almost surely, 2^208620690 is an apocalyptic number.

208620690 is an abundant number, since it is smaller than the sum of its proper divisors (292069038).

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

208620690 is a wasteful number, since it uses less digits than its factorization.

208620690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6954033.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 208620690 is about 14443.7076265064. The cubic root of 208620690 is about 593.0879847305.

The spelling of 208620690 in words is "two hundred eight million, six hundred twenty thousand, six hundred ninety".