71428618 has 8 divisors (see below), whose sum is σ = 107180640. Its totient is φ = 35701740.

The previous prime is 71428613. The next prime is 71428631. The reversal of 71428618 is 81682417.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×71428618³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (71428613) 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, 4563 + ... + 12793.

It is an arithmetic number, because the mean of its divisors is an integer number (13397580).

Almost surely, 2^71428618 is an apocalyptic number.

71428618 is a deficient number, since it is larger than the sum of its proper divisors (35752022).

71428618 is a wasteful number, since it uses less digits than its factorization.

71428618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12572.

The product of its digits is 21504, while the sum is 37.

The square root of 71428618 is about 8451.5453024876. The cubic root of 71428618 is about 414.9133568576.

The spelling of 71428618 in words is "seventy-one million, four hundred twenty-eight thousand, six hundred eighteen".