28922070 has 64 divisors (see below), whose sum is σ = 72493056. Its totient is φ = 7376640.

The previous prime is 28922059. The next prime is 28922071. The reversal of 28922070 is 7022982.

It is a super-2 number, since 2×28922070² = 1672972266169800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28922071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127297 + ... + 127523.

It is an arithmetic number, because the mean of its divisors is an integer number (1132704).

Almost surely, 2^28922070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28922070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36246528).

28922070 is an abundant number, since it is smaller than the sum of its proper divisors (43570986).

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

28922070 is a wasteful number, since it uses less digits than its factorization.

28922070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 28922070 is about 5377.9243207766. The cubic root of 28922070 is about 306.9562337918.

The spelling of 28922070 in words is "twenty-eight million, nine hundred twenty-two thousand, seventy".