28721314 has 8 divisors (see below), whose sum is σ = 44471808. Its totient is φ = 13897380.

The previous prime is 28721311. The next prime is 28721317. The reversal of 28721314 is 41312782.

28721314 = T₁₉₂ + T₁₉₃ + ... + T₅₆₃.

It is an interprime number because it is at equal distance from previous prime (28721311) and next prime (28721317).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28721311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231562 + ... + 231685.

It is an arithmetic number, because the mean of its divisors is an integer number (5558976).

Almost surely, 2^28721314 is an apocalyptic number.

28721314 is a deficient number, since it is larger than the sum of its proper divisors (15750494).

28721314 is a wasteful number, since it uses less digits than its factorization.

28721314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463280.

The product of its digits is 2688, while the sum is 28.

The square root of 28721314 is about 5359.2269964987. The cubic root of 28721314 is about 306.2443617454.

It can be divided in two parts, 2872 and 1314, that added together give a triangular number (4186 = T₉₁).

The spelling of 28721314 in words is "twenty-eight million, seven hundred twenty-one thousand, three hundred fourteen".