64209272 has 16 divisors (see below), whose sum is σ = 127474560. Its totient is φ = 30216064.

The previous prime is 64209263. The next prime is 64209281. The reversal of 64209272 is 27290246.

It is an interprime number because it is at equal distance from previous prime (64209263) and next prime (64209281).

It is a super-2 number, since 2×64209272² = 8245661221539968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235928 + ... + 236199.

It is an arithmetic number, because the mean of its divisors is an integer number (7967160).

Almost surely, 2^64209272 is an apocalyptic number.

It is an amenable number.

64209272 is a deficient number, since it is larger than the sum of its proper divisors (63265288).

64209272 is a wasteful number, since it uses less digits than its factorization.

64209272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472150 (or 472146 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 64209272 is about 8013.0688253627. The cubic root of 64209272 is about 400.4355089910.

The spelling of 64209272 in words is "sixty-four million, two hundred nine thousand, two hundred seventy-two".