90101270 has 32 divisors (see below), whose sum is σ = 188398656. Its totient is φ = 30384000.

The previous prime is 90101251. The next prime is 90101273. The reversal of 90101270 is 7210109.

It is a super-2 number, since 2×90101270² = 16236477711225800, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90101273) 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, 6281 + ... + 14820.

It is an arithmetic number, because the mean of its divisors is an integer number (5887458).

Almost surely, 2^90101270 is an apocalyptic number.

90101270 is an abundant number, since it is smaller than the sum of its proper divisors (98297386).

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

90101270 is a wasteful number, since it uses less digits than its factorization.

90101270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21176.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 90101270 is about 9492.1688775537. The cubic root of 90101270 is about 448.3084975240.

Adding to 90101270 its reverse (7210109), we get a palindrome (97311379).

The spelling of 90101270 in words is "ninety million, one hundred one thousand, two hundred seventy".