209474380 has 24 divisors (see below), whose sum is σ = 441010080. Its totient is φ = 83577600.

The previous prime is 209474341. The next prime is 209474383. The reversal of 209474380 is 83474902.

It is a happy number.

209474380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (209474383) 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, 5040 + ... + 21079.

It is an arithmetic number, because the mean of its divisors is an integer number (18375420).

Almost surely, 2^209474380 is an apocalyptic number.

209474380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

209474380 is an abundant number, since it is smaller than the sum of its proper divisors (231535700).

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

209474380 is a wasteful number, since it uses less digits than its factorization.

209474380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26529 (or 26527 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 209474380 is about 14473.2297708563. The cubic root of 209474380 is about 593.8958691654.

The spelling of 209474380 in words is "two hundred nine million, four hundred seventy-four thousand, three hundred eighty".