72093257428 has 24 divisors (see below), whose sum is σ = 127523670120. Its totient is φ = 35658547200.

The previous prime is 72093257417. The next prime is 72093257471. The reversal of 72093257428 is 82475239027.

It can be written as a sum of positive squares in 4 ways, for example, as 55310573124 + 16782684304 = 235182^2 + 129548^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388428 + ... + 543196.

It is an arithmetic number, because the mean of its divisors is an integer number (5313486255).

Almost surely, 2^72093257428 is an apocalyptic number.

It is an amenable number.

72093257428 is a deficient number, since it is larger than the sum of its proper divisors (55430412692).

72093257428 is a wasteful number, since it uses less digits than its factorization.

72093257428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156027 (or 156025 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 72093257428 in words is "seventy-two billion, ninety-three million, two hundred fifty-seven thousand, four hundred twenty-eight".