28621630 has 8 divisors (see below), whose sum is σ = 51518952. Its totient is φ = 11448648.

The previous prime is 28621603. The next prime is 28621631. The reversal of 28621630 is 3612682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28621631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1431072 + ... + 1431091.

It is an arithmetic number, because the mean of its divisors is an integer number (6439869).

Almost surely, 2^28621630 is an apocalyptic number.

28621630 is a deficient number, since it is larger than the sum of its proper divisors (22897322).

28621630 is a wasteful number, since it uses less digits than its factorization.

28621630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2862170.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 28621630 is about 5349.9186909709. The cubic root of 28621630 is about 305.8896536356.

The spelling of 28621630 in words is "twenty-eight million, six hundred twenty-one thousand, six hundred thirty".