73781248 has 26 divisors (see below), whose sum is σ = 147552674. Its totient is φ = 36888576.

The previous prime is 73781243. The next prime is 73781261. The reversal of 73781248 is 84218737.

It can be written as a sum of positive squares in only one way, i.e., 72454144 + 1327104 = 8512^2 + 1152^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 73781248.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73781243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4911 + ... + 13102.

Almost surely, 2^73781248 is an apocalyptic number.

It is an amenable number.

73781248 is a deficient number, since it is larger than the sum of its proper divisors (73771426).

73781248 is an equidigital number, since it uses as much as digits as its factorization.

73781248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18037 (or 18015 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 73781248 is about 8589.6011548849. The cubic root of 73781248 is about 419.4195458570.

The spelling of 73781248 in words is "seventy-three million, seven hundred eighty-one thousand, two hundred forty-eight".