28492037381 has 8 divisors (see below), whose sum is σ = 29189608728. Its totient is φ = 27794592000.

The previous prime is 28492037311. The next prime is 28492037389. The reversal of 28492037381 is 18373029482.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3910501156 + 24581536225 = 62534^2 + 156785^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28492037381 - 2²⁶ = 28424928517 is a prime.

It is a super-2 number, since 2×28492037381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28492037389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561191 + ... + 609851.

It is an arithmetic number, because the mean of its divisors is an integer number (3648701091).

Almost surely, 2^28492037381 is an apocalyptic number.

It is an amenable number.

28492037381 is a deficient number, since it is larger than the sum of its proper divisors (697571347).

28492037381 is a wasteful number, since it uses less digits than its factorization.

28492037381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62983.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 28492037381 in words is "twenty-eight billion, four hundred ninety-two million, thirty-seven thousand, three hundred eighty-one".