73539072 has 60 divisors (see below), whose sum is σ = 212252040. Its totient is φ = 24511488.

The previous prime is 73539061. The next prime is 73539121. The reversal of 73539072 is 27093537.

It is a happy number.

It is a super-2 number, since 2×73539072² = 10815990221242368, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3372 + ... + 12587.

It is an arithmetic number, because the mean of its divisors is an integer number (3537534).

Almost surely, 2^73539072 is an apocalyptic number.

73539072 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

73539072 is an abundant number, since it is smaller than the sum of its proper divisors (138712968).

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

73539072 is a wasteful number, since it uses less digits than its factorization.

73539072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15983 (or 15964 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 36.

The square root of 73539072 is about 8575.4925222986. The cubic root of 73539072 is about 418.9601487114.

The spelling of 73539072 in words is "seventy-three million, five hundred thirty-nine thousand, seventy-two".