72011445 has 32 divisors (see below), whose sum is σ = 126074880. Its totient is φ = 34808640.

The previous prime is 72011441. The next prime is 72011449. The reversal of 72011445 is 54411027.

It is an interprime number because it is at equal distance from previous prime (72011441) and next prime (72011449).

It is not a de Polignac number, because 72011445 - 2² = 72011441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72011441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99796 + ... + 100514.

It is an arithmetic number, because the mean of its divisors is an integer number (3939840).

Almost surely, 2^72011445 is an apocalyptic number.

It is an amenable number.

72011445 is a deficient number, since it is larger than the sum of its proper divisors (54063435).

72011445 is a wasteful number, since it uses less digits than its factorization.

72011445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 72011445 is about 8485.9557505328. The cubic root of 72011445 is about 416.0388065530.

It can be divided in two parts, 7201 and 1445, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 72011445 in words is "seventy-two million, eleven thousand, four hundred forty-five".