208409340 has 48 divisors (see below), whose sum is σ = 584478720. Its totient is φ = 55487040.

The previous prime is 208409339. The next prime is 208409351. The reversal of 208409340 is 43904802.

It is a happy number.

208409340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 208409298 and 208409307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40725 + ... + 45555.

It is an arithmetic number, because the mean of its divisors is an integer number (12176640).

Almost surely, 2^208409340 is an apocalyptic number.

208409340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208409340 is an abundant number, since it is smaller than the sum of its proper divisors (376069380).

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

208409340 is a wasteful number, since it uses less digits than its factorization.

208409340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5562 (or 5560 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 208409340 is about 14436.3894378061. The cubic root of 208409340 is about 592.8876346772.

The spelling of 208409340 in words is "two hundred eight million, four hundred nine thousand, three hundred forty".