85040799428 has 24 divisors (see below), whose sum is σ = 160306986840. Its totient is φ = 39240345600.

The previous prime is 85040799427. The next prime is 85040799443. The reversal of 85040799428 is 82499704058.

It can be written as a sum of positive squares in 4 ways, for example, as 28305370564 + 56735428864 = 168242^2 + 238192^2 .

It is a super-3 number, since 3×85040799428³ (a number of 34 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (85040799427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32378 + ... + 413678.

It is an arithmetic number, because the mean of its divisors is an integer number (6679457785).

Almost surely, 2^85040799428 is an apocalyptic number.

It is an amenable number.

85040799428 is a deficient number, since it is larger than the sum of its proper divisors (75266187412).

85040799428 is a wasteful number, since it uses less digits than its factorization.

85040799428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385607 (or 385605 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 85040799428 in words is "eighty-five billion, forty million, seven hundred ninety-nine thousand, four hundred twenty-eight".