28649292 has 24 divisors (see below), whose sum is σ = 76398336. Its totient is φ = 8185488.

The previous prime is 28649287. The next prime is 28649297. The reversal of 28649292 is 29294682.

It is an interprime number because it is at equal distance from previous prime (28649287) and next prime (28649297).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (28649297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170448 + ... + 170615.

It is an arithmetic number, because the mean of its divisors is an integer number (3183264).

Almost surely, 2^28649292 is an apocalyptic number.

It is an amenable number.

28649292 is an abundant number, since it is smaller than the sum of its proper divisors (47749044).

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

28649292 is a wasteful number, since it uses less digits than its factorization.

28649292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341077 (or 341075 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 28649292 is about 5352.5033395599. The cubic root of 28649292 is about 305.9881664867.

The spelling of 28649292 in words is "twenty-eight million, six hundred forty-nine thousand, two hundred ninety-two".