73721036 has 12 divisors (see below), whose sum is σ = 129997560. Its totient is φ = 36578880.

The previous prime is 73721033. The next prime is 73721041. The reversal of 73721036 is 63012737.

It is a super-2 number, since 2×73721036² = 10869582297826592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (73721033) 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, 69821 + ... + 70868.

It is an arithmetic number, because the mean of its divisors is an integer number (10833130).

Almost surely, 2^73721036 is an apocalyptic number.

It is an amenable number.

73721036 is a deficient number, since it is larger than the sum of its proper divisors (56276524).

73721036 is a wasteful number, since it uses less digits than its factorization.

73721036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140824 (or 140822 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 29.

The square root of 73721036 is about 8586.0955037782. The cubic root of 73721036 is about 419.3054203696.

The spelling of 73721036 in words is "seventy-three million, seven hundred twenty-one thousand, thirty-six".