71428206 has 16 divisors (see below), whose sum is σ = 145552464. Its totient is φ = 23360064.

The previous prime is 71428183. The next prime is 71428207. The reversal of 71428206 is 60282417.

It is a super-2 number, since 2×71428206² = 10203977224756872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71428207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111991 + ... + 112626.

It is an arithmetic number, because the mean of its divisors is an integer number (9097029).

Almost surely, 2^71428206 is an apocalyptic number.

71428206 is an abundant number, since it is smaller than the sum of its proper divisors (74124258).

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

71428206 is a wasteful number, since it uses less digits than its factorization.

71428206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224675.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 71428206 is about 8451.5209282117. The cubic root of 71428206 is about 414.9125591165.

It can be divided in two parts, 714 and 28206, that added together give a triangular number (28920 = T₂₄₀).

The spelling of 71428206 in words is "seventy-one million, four hundred twenty-eight thousand, two hundred six".