85561620 has 48 divisors (see below), whose sum is σ = 244677888. Its totient is φ = 22330240.

The previous prime is 85561601. The next prime is 85561627. The reversal of 85561620 is 2616558.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85561627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12351 + ... + 17990.

It is an arithmetic number, because the mean of its divisors is an integer number (5097456).

Almost surely, 2^85561620 is an apocalyptic number.

It is an amenable number.

85561620 is an abundant number, since it is smaller than the sum of its proper divisors (159116268).

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

85561620 is a wasteful number, since it uses less digits than its factorization.

85561620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30400 (or 30398 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 85561620 is about 9249.9524323101. The cubic root of 85561620 is about 440.6492137994.

The spelling of 85561620 in words is "eighty-five million, five hundred sixty-one thousand, six hundred twenty".