85438658 has 8 divisors (see below), whose sum is σ = 129780480. Its totient is φ = 42178500.

The previous prime is 85438657. The next prime is 85438663. The reversal of 85438658 is 85683458.

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

It is not an unprimeable number, because it can be changed into a prime (85438657) 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, 270218 + ... + 270533.

It is an arithmetic number, because the mean of its divisors is an integer number (16222560).

Almost surely, 2^85438658 is an apocalyptic number.

85438658 is a deficient number, since it is larger than the sum of its proper divisors (44341822).

85438658 is a wasteful number, since it uses less digits than its factorization.

85438658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540832.

The product of its digits is 921600, while the sum is 47.

The square root of 85438658 is about 9243.3034138234. The cubic root of 85438658 is about 440.4380245412.

It can be divided in two parts, 85 and 438658, that multiplied together give a triangular number (37285930 = T₈₆₃₅).

The spelling of 85438658 in words is "eighty-five million, four hundred thirty-eight thousand, six hundred fifty-eight".