28631070 has 80 divisors (see below), whose sum is σ = 82938240. Its totient is φ = 7045056.

The previous prime is 28631069. The next prime is 28631093. The reversal of 28631070 is 7013682.

28631070 is a `hidden beast` number, since 28 + 631 + 0 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9171 + ... + 11889.

It is an arithmetic number, because the mean of its divisors is an integer number (1036728).

Almost surely, 2^28631070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28631070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41469120).

28631070 is an abundant number, since it is smaller than the sum of its proper divisors (54307170).

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

28631070 is a wasteful number, since it uses less digits than its factorization.

28631070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751 (or 2742 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 28631070 is about 5350.8008746355. The cubic root of 28631070 is about 305.9232794975.

The spelling of 28631070 in words is "twenty-eight million, six hundred thirty-one thousand, seventy".