28149630 has 32 divisors (see below), whose sum is σ = 67726368. Its totient is φ = 7488000.

The previous prime is 28149623. The next prime is 28149661. The reversal of 28149630 is 3694182.

It is a junction number, because it is equal to n+sod(n) for n = 28149591 and 28149600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14730 + ... + 16530.

It is an arithmetic number, because the mean of its divisors is an integer number (2116449).

Almost surely, 2^28149630 is an apocalyptic number.

28149630 is an abundant number, since it is smaller than the sum of its proper divisors (39576738).

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

28149630 is a wasteful number, since it uses less digits than its factorization.

28149630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28149630 is about 5305.6224893975. The cubic root of 28149630 is about 304.1988469945.

The spelling of 28149630 in words is "twenty-eight million, one hundred forty-nine thousand, six hundred thirty".