85401770 has 48 divisors (see below), whose sum is σ = 166484808. Its totient is φ = 31518720.

The previous prime is 85401749. The next prime is 85401791. The reversal of 85401770 is 7710458.

It is an interprime number because it is at equal distance from previous prime (85401749) and next prime (85401791).

It can be written as a sum of positive squares in 4 ways, for example, as 72777961 + 12623809 = 8531^2 + 3553^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147722 + ... + 148298.

Almost surely, 2^85401770 is an apocalyptic number.

85401770 is a deficient number, since it is larger than the sum of its proper divisors (81083038).

85401770 is a wasteful number, since it uses less digits than its factorization.

85401770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 85401770 is about 9241.3078078809. The cubic root of 85401770 is about 440.3746292859.

The spelling of 85401770 in words is "eighty-five million, four hundred one thousand, seven hundred seventy".