28031070 has 32 divisors (see below), whose sum is σ = 67456800. Its totient is φ = 7454720.

The previous prime is 28031057. The next prime is 28031071. The reversal of 28031070 is 7013082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28031071) 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, 12430 + ... + 14510.

It is an arithmetic number, because the mean of its divisors is an integer number (2108025).

Almost surely, 2^28031070 is an apocalyptic number.

28031070 is an abundant number, since it is smaller than the sum of its proper divisors (39425730).

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

28031070 is a wasteful number, since it uses less digits than its factorization.

28031070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 28031070 is about 5294.4376471916. The cubic root of 28031070 is about 303.7711733111.

The spelling of 28031070 in words is "twenty-eight million, thirty-one thousand, seventy".