180028454 has 4 divisors (see below), whose sum is σ = 270042684. Its totient is φ = 90014226.

The previous prime is 180028451. The next prime is 180028481. The reversal of 180028454 is 454820081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 180028454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180028451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45007112 + ... + 45007115.

It is an arithmetic number, because the mean of its divisors is an integer number (67510671).

Almost surely, 2^180028454 is an apocalyptic number.

180028454 is a deficient number, since it is larger than the sum of its proper divisors (90014230).

180028454 is an equidigital number, since it uses as much as digits as its factorization.

180028454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90014229.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 180028454 is about 13417.4682410655. The cubic root of 180028454 is about 564.6513671379.

The spelling of 180028454 in words is "one hundred eighty million, twenty-eight thousand, four hundred fifty-four".