208472540 has 12 divisors (see below), whose sum is σ = 437792376. Its totient is φ = 83389008.

The previous prime is 208472533. The next prime is 208472549. The reversal of 208472540 is 45274802.

208472540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 208472497 and 208472506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208472549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5211794 + ... + 5211833.

It is an arithmetic number, because the mean of its divisors is an integer number (36482698).

Almost surely, 2^208472540 is an apocalyptic number.

208472540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

208472540 is an abundant number, since it is smaller than the sum of its proper divisors (229319836).

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

208472540 is a wasteful number, since it uses less digits than its factorization.

208472540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10423636 (or 10423634 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 208472540 is about 14438.5781848491. The cubic root of 208472540 is about 592.9475595531.

The spelling of 208472540 in words is "two hundred eight million, four hundred seventy-two thousand, five hundred forty".