8720146 has 16 divisors (see below), whose sum is σ = 13372128. Its totient is φ = 4264000.

The previous prime is 8720137. The next prime is 8720161. The reversal of 8720146 is 6410278.

It is a super-2 number, since 2×8720146² = 152081892522632, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21546 + ... + 21946.

It is an arithmetic number, because the mean of its divisors is an integer number (835758).

Almost surely, 2^8720146 is an apocalyptic number.

8720146 is a deficient number, since it is larger than the sum of its proper divisors (4651982).

8720146 is a wasteful number, since it uses less digits than its factorization.

8720146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 8720146 is about 2952.9893328625. The cubic root of 8720146 is about 205.8296420449.

The spelling of 8720146 in words is "eight million, seven hundred twenty thousand, one hundred forty-six".