28761630 has 32 divisors (see below), whose sum is σ = 72662400. Its totient is φ = 7265952.

The previous prime is 28761599. The next prime is 28761631. The reversal of 28761630 is 3616782.

It is a junction number, because it is equal to n+sod(n) for n = 28761591 and 28761600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28761631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24660 + ... + 25799.

It is an arithmetic number, because the mean of its divisors is an integer number (2270700).

Almost surely, 2^28761630 is an apocalyptic number.

28761630 is an abundant number, since it is smaller than the sum of its proper divisors (43900770).

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

28761630 is a wasteful number, since it uses less digits than its factorization.

28761630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50488.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 28761630 is about 5362.9870408197. The cubic root of 28761630 is about 306.3875861032.

The spelling of 28761630 in words is "twenty-eight million, seven hundred sixty-one thousand, six hundred thirty".