208878078 has 16 divisors (see below), whose sum is σ = 417998736. Its totient is φ = 69585600.

The previous prime is 208878073. The next prime is 208878083. The reversal of 208878078 is 870878802.

It is an interprime number because it is at equal distance from previous prime (208878073) and next prime (208878083).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208878073) 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, 2250 + ... + 20562.

It is an arithmetic number, because the mean of its divisors is an integer number (26124921).

Almost surely, 2^208878078 is an apocalyptic number.

208878078 is an abundant number, since it is smaller than the sum of its proper divisors (209120658).

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

208878078 is a wasteful number, since it uses less digits than its factorization.

208878078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20219.

The product of its (nonzero) digits is 401408, while the sum is 48.

The square root of 208878078 is about 14452.6149191072. The cubic root of 208878078 is about 593.3317940316.

The spelling of 208878078 in words is "two hundred eight million, eight hundred seventy-eight thousand, seventy-eight".