85670040 has 32 divisors (see below), whose sum is σ = 257010480. Its totient is φ = 22845312.

The previous prime is 85670017. The next prime is 85670051. The reversal of 85670040 is 4007658.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356839 + ... + 357078.

Almost surely, 2^85670040 is an apocalyptic number.

It is an amenable number.

85670040 is an abundant number, since it is smaller than the sum of its proper divisors (171340440).

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

85670040 is a wasteful number, since it uses less digits than its factorization.

85670040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713931 (or 713927 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 85670040 is about 9255.8111475980. The cubic root of 85670040 is about 440.8352591407.

Adding to 85670040 its reverse (4007658), we get a palindrome (89677698).

The spelling of 85670040 in words is "eighty-five million, six hundred seventy thousand, forty".