28400250547 has 8 divisors (see below), whose sum is σ = 28540512000. Its totient is φ = 28260329544.

The previous prime is 28400250539. The next prime is 28400250577. The reversal of 28400250547 is 74505200482.

It is a happy number.

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 28400250547 - 2³ = 28400250539 is a prime.

It is a super-2 number, since 2×28400250547² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28400250577) 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, 82954 + ... + 252352.

It is an arithmetic number, because the mean of its divisors is an integer number (3567564000).

Almost surely, 2^28400250547 is an apocalyptic number.

28400250547 is a deficient number, since it is larger than the sum of its proper divisors (140261453).

28400250547 is a wasteful number, since it uses less digits than its factorization.

28400250547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170225.

The product of its (nonzero) digits is 89600, while the sum is 37.

The spelling of 28400250547 in words is "twenty-eight billion, four hundred million, two hundred fifty thousand, five hundred forty-seven".