28451630 has 16 divisors (see below), whose sum is σ = 51436944. Its totient is φ = 11330880.

The previous prime is 28451597. The next prime is 28451641. The reversal of 28451630 is 3615482.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28451593 and 28451602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3776 + ... + 8435.

It is an arithmetic number, because the mean of its divisors is an integer number (3214809).

Almost surely, 2^28451630 is an apocalyptic number.

28451630 is a deficient number, since it is larger than the sum of its proper divisors (22985314).

28451630 is a wasteful number, since it uses less digits than its factorization.

28451630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12451.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 28451630 is about 5334.0069366284. The cubic root of 28451630 is about 305.2828335827.

The spelling of 28451630 in words is "twenty-eight million, four hundred fifty-one thousand, six hundred thirty".