65449072 has 40 divisors (see below), whose sum is σ = 143758160. Its totient is φ = 28615680.

The previous prime is 65449067. The next prime is 65449073. The reversal of 65449072 is 27094456.

It is a super-2 number, since 2×65449072² = 8567162051322368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65449073) 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, 4329 + ... + 12232.

It is an arithmetic number, because the mean of its divisors is an integer number (3593954).

Almost surely, 2^65449072 is an apocalyptic number.

It is an amenable number.

65449072 is an abundant number, since it is smaller than the sum of its proper divisors (78309088).

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

65449072 is a wasteful number, since it uses less digits than its factorization.

65449072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16601 (or 16595 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 65449072 is about 8090.0600739426. The cubic root of 65449072 is about 402.9963979507.

The spelling of 65449072 in words is "sixty-five million, four hundred forty-nine thousand, seventy-two".