72403750 has 20 divisors (see below), whose sum is σ = 135715932. Its totient is φ = 28961000.

The previous prime is 72403739. The next prime is 72403753. The reversal of 72403750 is 5730427.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72403753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 27712 + ... + 30211.

Almost surely, 2^72403750 is an apocalyptic number.

72403750 is a deficient number, since it is larger than the sum of its proper divisors (63312182).

72403750 is an equidigital number, since it uses as much as digits as its factorization.

72403750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57945 (or 57930 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 72403750 is about 8509.0393112266. The cubic root of 72403750 is about 416.7929395063.

It can be divided in two parts, 72403 and 750, that added together give a triangular number (73153 = T₃₈₂).

The spelling of 72403750 in words is "seventy-two million, four hundred three thousand, seven hundred fifty".