85428924440 has 16 divisors (see below), whose sum is σ = 192215080080. Its totient is φ = 34171569760.

The previous prime is 85428924421. The next prime is 85428924443. The reversal of 85428924440 is 4442982458.

It is a super-2 number, since 2×85428924440² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85428924443) 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, 1067861516 + ... + 1067861595.

It is an arithmetic number, because the mean of its divisors is an integer number (12013442505).

Almost surely, 2^85428924440 is an apocalyptic number.

It is an amenable number.

85428924440 is an abundant number, since it is smaller than the sum of its proper divisors (106786155640).

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

85428924440 is a wasteful number, since it uses less digits than its factorization.

85428924440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135723122 (or 2135723118 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 50.

The spelling of 85428924440 in words is "eighty-five billion, four hundred twenty-eight million, nine hundred twenty-four thousand, four hundred forty".