85402647 has 24 divisors (see below), whose sum is σ = 139075440. Its totient is φ = 51757200.

The previous prime is 85402643. The next prime is 85402673. The reversal of 85402647 is 74620458.

85402647 is a `hidden beast` number, since 8 + 5 + 4 + 0 + 2 + 647 = 666.

It is not a de Polignac number, because 85402647 - 2² = 85402643 is a prime.

It is a super-2 number, since 2×85402647² = 14587224229213218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85402643) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9804 + ... + 16337.

It is an arithmetic number, because the mean of its divisors is an integer number (5794810).

Almost surely, 2^85402647 is an apocalyptic number.

85402647 is a deficient number, since it is larger than the sum of its proper divisors (53672793).

85402647 is a wasteful number, since it uses less digits than its factorization.

85402647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26172 (or 26155 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 85402647 is about 9241.3552577531. The cubic root of 85402647 is about 440.3761366989.

The spelling of 85402647 in words is "eighty-five million, four hundred two thousand, six hundred forty-seven".