85435640 has 16 divisors (see below), whose sum is σ = 192230280. Its totient is φ = 34174240.

The previous prime is 85435633. The next prime is 85435657. The reversal of 85435640 is 4653458.

It is a self number, because there is not a number n which added to its sum of digits gives 85435640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1067906 + ... + 1067985.

Almost surely, 2^85435640 is an apocalyptic number.

It is an amenable number.

85435640 is an abundant number, since it is smaller than the sum of its proper divisors (106794640).

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

85435640 is a wasteful number, since it uses less digits than its factorization.

85435640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135902 (or 2135898 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 85435640 is about 9243.1401590585. The cubic root of 85435640 is about 440.4328385296.

The spelling of 85435640 in words is "eighty-five million, four hundred thirty-five thousand, six hundred forty".