28910474 has 4 divisors (see below), whose sum is σ = 43365714. Its totient is φ = 14455236.

The previous prime is 28910473. The next prime is 28910501. The reversal of 28910474 is 47401982.

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

It can be written as a sum of positive squares in only one way, i.e., 20748025 + 8162449 = 4555^2 + 2857^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28910473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7227617 + ... + 7227620.

Almost surely, 2^28910474 is an apocalyptic number.

28910474 is a deficient number, since it is larger than the sum of its proper divisors (14455240).

28910474 is a wasteful number, since it uses less digits than its factorization.

28910474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14455239.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 28910474 is about 5376.8461015729. The cubic root of 28910474 is about 306.9152046826.

The spelling of 28910474 in words is "twenty-eight million, nine hundred ten thousand, four hundred seventy-four".