72465520 has 20 divisors (see below), whose sum is σ = 168482520. Its totient is φ = 28986176.

The previous prime is 72465473. The next prime is 72465529. The reversal of 72465520 is 2556427.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72465529) 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, 452830 + ... + 452989.

It is an arithmetic number, because the mean of its divisors is an integer number (8424126).

Almost surely, 2^72465520 is an apocalyptic number.

It is an amenable number.

72465520 is an abundant number, since it is smaller than the sum of its proper divisors (96017000).

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

72465520 is a wasteful number, since it uses less digits than its factorization.

72465520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905832 (or 905826 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 72465520 is about 8512.6682068550. The cubic root of 72465520 is about 416.9114323650.

The spelling of 72465520 in words is "seventy-two million, four hundred sixty-five thousand, five hundred twenty".