85381924 has 6 divisors (see below), whose sum is σ = 149418374. Its totient is φ = 42690960.

The previous prime is 85381921. The next prime is 85381927. The reversal of 85381924 is 42918358.

It is an interprime number because it is at equal distance from previous prime (85381921) and next prime (85381927).

It can be written as a sum of positive squares in only one way, i.e., 85229824 + 152100 = 9232^2 + 390^2 .

It is not an unprimeable number, because it can be changed into a prime (85381921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10672737 + ... + 10672744.

Almost surely, 2^85381924 is an apocalyptic number.

It is an amenable number.

85381924 is a deficient number, since it is larger than the sum of its proper divisors (64036450).

85381924 is a wasteful number, since it uses less digits than its factorization.

85381924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21345485 (or 21345483 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 85381924 is about 9240.2339797215. The cubic root of 85381924 is about 440.3405146457.

The spelling of 85381924 in words is "eighty-five million, three hundred eighty-one thousand, nine hundred twenty-four".