85072388 has 6 divisors (see below), whose sum is σ = 148876686. Its totient is φ = 42536192.

The previous prime is 85072387. The next prime is 85072439. The reversal of 85072388 is 88327058.

It can be written as a sum of positive squares in only one way, i.e., 81144064 + 3928324 = 9008^2 + 1982^2 .

It is a super-2 number, since 2×85072388² = 14474622400045088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85072387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10634045 + ... + 10634052.

It is an arithmetic number, because the mean of its divisors is an integer number (24812781).

Almost surely, 2^85072388 is an apocalyptic number.

It is an amenable number.

85072388 is a deficient number, since it is larger than the sum of its proper divisors (63804298).

85072388 is a wasteful number, since it uses less digits than its factorization.

85072388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21268101 (or 21268099 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 85072388 is about 9223.4694123199. The cubic root of 85072388 is about 439.8077465876.

The spelling of 85072388 in words is "eighty-five million, seventy-two thousand, three hundred eighty-eight".