85615490 has 48 divisors (see below), whose sum is σ = 163010880. Its totient is φ = 32364000.

The previous prime is 85615489. The next prime is 85615493. The reversal of 85615490 is 9451658.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85615493) by changing a digit.

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, 566915 + ... + 567065.

It is an arithmetic number, because the mean of its divisors is an integer number (3396060).

Almost surely, 2^85615490 is an apocalyptic number.

85615490 is a deficient number, since it is larger than the sum of its proper divisors (77395390).

85615490 is a wasteful number, since it uses less digits than its factorization.

85615490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 85615490 is about 9252.8638809830. The cubic root of 85615490 is about 440.7416726732.

The spelling of 85615490 in words is "eighty-five million, six hundred fifteen thousand, four hundred ninety".