28741478 has 4 divisors (see below), whose sum is σ = 43112220. Its totient is φ = 14370738.

The previous prime is 28741417. The next prime is 28741481. The reversal of 28741478 is 87414782.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7185368 + ... + 7185371.

It is an arithmetic number, because the mean of its divisors is an integer number (10778055).

Almost surely, 2^28741478 is an apocalyptic number.

28741478 is a deficient number, since it is larger than the sum of its proper divisors (14370742).

28741478 is a wasteful number, since it uses less digits than its factorization.

28741478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14370741.

The product of its digits is 100352, while the sum is 41.

The square root of 28741478 is about 5361.1079078862. The cubic root of 28741478 is about 306.3160119814.

The spelling of 28741478 in words is "twenty-eight million, seven hundred forty-one thousand, four hundred seventy-eight".