85428980 has 96 divisors (see below), whose sum is σ = 224173824. Its totient is φ = 26625024.

The previous prime is 85428947. The next prime is 85428989. The reversal of 85428980 is 8982458.

It is a super-2 number, since 2×85428980² = 14596221247680800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85428989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132539 + ... + 133181.

It is an arithmetic number, because the mean of its divisors is an integer number (2335144).

Almost surely, 2^85428980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85428980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112086912).

85428980 is an abundant number, since it is smaller than the sum of its proper divisors (138744844).

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

85428980 is a wasteful number, since it uses less digits than its factorization.

85428980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 85428980 is about 9242.7798848615. The cubic root of 85428980 is about 440.4213938174.

The spelling of 85428980 in words is "eighty-five million, four hundred twenty-eight thousand, nine hundred eighty".