84422720 has 28 divisors (see below), whose sum is σ = 201032364. Its totient is φ = 33768960.

The previous prime is 84422713. The next prime is 84422729. The reversal of 84422720 is 2722448.

It can be written as a sum of positive squares in 2 ways, for example, as 58859584 + 25563136 = 7672^2 + 5056^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (84422729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131591 + ... + 132230.

Almost surely, 2^84422720 is an apocalyptic number.

84422720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

84422720 is an abundant number, since it is smaller than the sum of its proper divisors (116609644).

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

84422720 is a wasteful number, since it uses less digits than its factorization.

84422720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263838 (or 263828 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 84422720 is about 9188.1837160562. The cubic root of 84422720 is about 438.6853320382.

The spelling of 84422720 in words is "eighty-four million, four hundred twenty-two thousand, seven hundred twenty".