71428210 has 32 divisors (see below), whose sum is σ = 148407552. Its totient is φ = 24244800.

The previous prime is 71428207. The next prime is 71428213. The reversal of 71428210 is 1282417.

71428210 = T₂₅₉ + T₂₆₀ + ... + T₇₆₃.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71428207) and next prime (71428213).

It is not an unprimeable number, because it can be changed into a prime (71428213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2019 + ... + 12121.

It is an arithmetic number, because the mean of its divisors is an integer number (4637736).

Almost surely, 2^71428210 is an apocalyptic number.

71428210 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

71428210 is an abundant number, since it is smaller than the sum of its proper divisors (76979342).

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

71428210 is a wasteful number, since it uses less digits than its factorization.

71428210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10218.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 71428210 is about 8451.5211648555. The cubic root of 71428210 is about 414.9125668616.

The spelling of 71428210 in words is "seventy-one million, four hundred twenty-eight thousand, two hundred ten".