64473372 has 36 divisors (see below), whose sum is σ = 163819656. Its totient is φ = 21379680.

The previous prime is 64473359. The next prime is 64473379. The reversal of 64473372 is 27337446.

It is a happy number.

64473372 is a `hidden beast` number, since 644 + 7 + 3 + 3 + 7 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64473379) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2547 + ... + 11637.

It is an arithmetic number, because the mean of its divisors is an integer number (4550546).

Almost surely, 2^64473372 is an apocalyptic number.

It is an amenable number.

64473372 is an abundant number, since it is smaller than the sum of its proper divisors (99346284).

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

64473372 is a wasteful number, since it uses less digits than its factorization.

64473372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9298 (or 9293 counting only the distinct ones).

The product of its digits is 84672, while the sum is 36.

The square root of 64473372 is about 8029.5312441014. The cubic root of 64473372 is about 400.9837701737.

The spelling of 64473372 in words is "sixty-four million, four hundred seventy-three thousand, three hundred seventy-two".