71428570 has 16 divisors (see below), whose sum is σ = 134161920. Its totient is φ = 27329104.

The previous prime is 71428559. The next prime is 71428571. The reversal of 71428570 is 7582417.

It is a happy number.

It is a super-2 number, since 2×71428570² = 10204081224489800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71428571) 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 7 ways as a sum of consecutive naturals, for example, 155050 + ... + 155509.

It is an arithmetic number, because the mean of its divisors is an integer number (8385120).

Almost surely, 2^71428570 is an apocalyptic number.

71428570 is a deficient number, since it is larger than the sum of its proper divisors (62733350).

71428570 is a wasteful number, since it uses less digits than its factorization.

71428570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310589.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 71428570 is about 8451.5424627697. The cubic root of 71428570 is about 414.9132639170.

The spelling of 71428570 in words is "seventy-one million, four hundred twenty-eight thousand, five hundred seventy".