28054402 has 12 divisors (see below), whose sum is σ = 42661890. Its totient is φ = 13834656.

The previous prime is 28054387. The next prime is 28054409. The reversal of 28054402 is 20445082.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 24098281 + 3956121 = 4909^2 + 1989^2 .

It is not an unprimeable number, because it can be changed into a prime (28054409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70468 + ... + 70864.

Almost surely, 2^28054402 is an apocalyptic number.

28054402 is a deficient number, since it is larger than the sum of its proper divisors (14607488).

28054402 is an frugal number, since it uses more digits than its factorization.

28054402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 28054402 is about 5296.6406334582. The cubic root of 28054402 is about 303.8554324736.

Adding to 28054402 its reverse (20445082), we get a palindrome (48499484).

The spelling of 28054402 in words is "twenty-eight million, fifty-four thousand, four hundred two".