28937970 has 48 divisors (see below), whose sum is σ = 76377600. Its totient is φ = 7600032.

The previous prime is 28937939. The next prime is 28937971. The reversal of 28937970 is 7973982.

It is a super-2 number, since 2×28937970² = 1674812215441800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28937971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3631 + ... + 8429.

It is an arithmetic number, because the mean of its divisors is an integer number (1591200).

Almost surely, 2^28937970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28937970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38188800).

28937970 is an abundant number, since it is smaller than the sum of its proper divisors (47439630).

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

28937970 is a wasteful number, since it uses less digits than its factorization.

28937970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4879 (or 4876 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 28937970 is about 5379.4023831649. The cubic root of 28937970 is about 307.0124735424.

The spelling of 28937970 in words is "twenty-eight million, nine hundred thirty-seven thousand, nine hundred seventy".