28149516 has 36 divisors (see below), whose sum is σ = 74251632. Its totient is φ = 8974944.

The previous prime is 28149503. The next prime is 28149529. The reversal of 28149516 is 61594182.

It is an interprime number because it is at equal distance from previous prime (28149503) and next prime (28149529).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16171 + ... + 17826.

Almost surely, 2^28149516 is an apocalyptic number.

It is an amenable number.

28149516 is an abundant number, since it is smaller than the sum of its proper divisors (46102116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28149516 is a wasteful number, since it uses less digits than its factorization.

28149516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34030 (or 34025 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 28149516 is about 5305.6117460666. The cubic root of 28149516 is about 304.1984363472.

The spelling of 28149516 in words is "twenty-eight million, one hundred forty-nine thousand, five hundred sixteen".