28992625 has 16 divisors (see below), whose sum is σ = 36468432. Its totient is φ = 23011200.

The previous prime is 28992619. The next prime is 28992631. The reversal of 28992625 is 52629982.

It is an interprime number because it is at equal distance from previous prime (28992619) and next prime (28992631).

It can be written as a sum of positive squares in 8 ways, for example, as 9834496 + 19158129 = 3136^2 + 4377^2 .

It is not a de Polignac number, because 28992625 - 2¹³ = 28984433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16279 + ... + 17971.

It is an arithmetic number, because the mean of its divisors is an integer number (2279277).

Almost surely, 2^28992625 is an apocalyptic number.

28992625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28992625 is a deficient number, since it is larger than the sum of its proper divisors (7475807).

28992625 is a wasteful number, since it uses less digits than its factorization.

28992625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845 (or 1835 counting only the distinct ones).

The product of its digits is 155520, while the sum is 43.

The square root of 28992625 is about 5384.4800120346. The cubic root of 28992625 is about 307.2056362955.

The spelling of 28992625 in words is "twenty-eight million, nine hundred ninety-two thousand, six hundred twenty-five".