209901264 has 40 divisors (see below), whose sum is σ = 542902752. Its totient is φ = 69882240.

The previous prime is 209901257. The next prime is 209901269. The reversal of 209901264 is 462109902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209901269) 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, 46867 + ... + 51149.

Almost surely, 2^209901264 is an apocalyptic number.

209901264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

209901264 is an abundant number, since it is smaller than the sum of its proper divisors (333001488).

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

209901264 is a wasteful number, since it uses less digits than its factorization.

209901264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5315 (or 5309 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 209901264 is about 14487.9696300068. The cubic root of 209901264 is about 594.2990252636.

The spelling of 209901264 in words is "two hundred nine million, nine hundred one thousand, two hundred sixty-four".