85906840 has 32 divisors (see below), whose sum is σ = 201696480. Its totient is φ = 32868352.

The previous prime is 85906823. The next prime is 85906871. The reversal of 85906840 is 4860958.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 85906793 and 85906802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45769 + ... + 47608.

It is an arithmetic number, because the mean of its divisors is an integer number (6303015).

Almost surely, 2^85906840 is an apocalyptic number.

It is an amenable number.

85906840 is an abundant number, since it is smaller than the sum of its proper divisors (115789640).

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

85906840 is a wasteful number, since it uses less digits than its factorization.

85906840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93411 (or 93407 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 85906840 is about 9268.5942839246. The cubic root of 85906840 is about 441.2410554407.

The spelling of 85906840 in words is "eighty-five million, nine hundred six thousand, eight hundred forty".