28891030 has 32 divisors (see below), whose sum is σ = 59641920. Its totient is φ = 9870720.

The previous prime is 28891021. The next prime is 28891069. The reversal of 28891030 is 3019882.

It is a super-2 number, since 2×28891030² = 1669383228921800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28890983 and 28891001.

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, 26700 + ... + 27760.

It is an arithmetic number, because the mean of its divisors is an integer number (1863810).

Almost surely, 2^28891030 is an apocalyptic number.

28891030 is an abundant number, since it is smaller than the sum of its proper divisors (30750890).

28891030 is a wasteful number, since it uses less digits than its factorization.

28891030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1464.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 28891030 is about 5375.0376742866. The cubic root of 28891030 is about 306.8463830552.

The spelling of 28891030 in words is "twenty-eight million, eight hundred ninety-one thousand, thirty".