90640400270 has 32 divisors (see below), whose sum is σ = 191008069056. Its totient is φ = 30318739200.

The previous prime is 90640400203. The next prime is 90640400273. The reversal of 90640400270 is 7200404609.

It is a super-2 number, since 2×90640400270² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90640400273) 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, 15788141 + ... + 15793880.

It is an arithmetic number, because the mean of its divisors is an integer number (5969002158).

Almost surely, 2^90640400270 is an apocalyptic number.

90640400270 is an abundant number, since it is smaller than the sum of its proper divisors (100367668786).

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

90640400270 is a wasteful number, since it uses less digits than its factorization.

90640400270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31582076.

The product of its (nonzero) digits is 12096, while the sum is 32.

Adding to 90640400270 its reverse (7200404609), we get a palindrome (97840804879).

The spelling of 90640400270 in words is "ninety billion, six hundred forty million, four hundred thousand, two hundred seventy".