72973904 has 10 divisors (see below), whose sum is σ = 141386970. Its totient is φ = 36486944.

The previous prime is 72973883. The next prime is 72973909. The reversal of 72973904 is 40937927.

It can be written as a sum of positive squares in only one way, i.e., 71436304 + 1537600 = 8452^2 + 1240^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72973909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2280419 + ... + 2280450.

It is an arithmetic number, because the mean of its divisors is an integer number (14138697).

Almost surely, 2^72973904 is an apocalyptic number.

It is an amenable number.

72973904 is a deficient number, since it is larger than the sum of its proper divisors (68413066).

72973904 is a wasteful number, since it uses less digits than its factorization.

72973904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4560877 (or 4560871 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 72973904 is about 8542.4764559231. The cubic root of 72973904 is about 417.8841127731.

The spelling of 72973904 in words is "seventy-two million, nine hundred seventy-three thousand, nine hundred four".