73781072 has 20 divisors (see below), whose sum is σ = 143100960. Its totient is φ = 36851808.

The previous prime is 73781069. The next prime is 73781087. The reversal of 73781072 is 27018737.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 19079 + ... + 22617.

It is an arithmetic number, because the mean of its divisors is an integer number (7155048).

Almost surely, 2^73781072 is an apocalyptic number.

It is an amenable number.

73781072 is a deficient number, since it is larger than the sum of its proper divisors (69319888).

73781072 is a wasteful number, since it uses less digits than its factorization.

73781072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4850 (or 4844 counting only the distinct ones).

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 73781072 is about 8589.5909099328. The cubic root of 73781072 is about 419.4192123581.

The spelling of 73781072 in words is "seventy-three million, seven hundred eighty-one thousand, seventy-two".