28457516 has 12 divisors (see below), whose sum is σ = 52421880. Its totient is φ = 13479840.

The previous prime is 28457501. The next prime is 28457531. The reversal of 28457516 is 61575482.

It is an interprime number because it is at equal distance from previous prime (28457501) and next prime (28457531).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 28457516.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187145 + ... + 187296.

It is an arithmetic number, because the mean of its divisors is an integer number (4368490).

Almost surely, 2^28457516 is an apocalyptic number.

It is an amenable number.

28457516 is a deficient number, since it is larger than the sum of its proper divisors (23964364).

28457516 is a wasteful number, since it uses less digits than its factorization.

28457516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374464 (or 374462 counting only the distinct ones).

The product of its digits is 67200, while the sum is 38.

The square root of 28457516 is about 5334.5586509101. The cubic root of 28457516 is about 305.3038841735.

The spelling of 28457516 in words is "twenty-eight million, four hundred fifty-seven thousand, five hundred sixteen".