90143874 has 16 divisors (see below), whose sum is σ = 200319840. Its totient is φ = 30047940.

The previous prime is 90143873. The next prime is 90143887. The reversal of 90143874 is 47834109.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (90143873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 834612 + ... + 834719.

It is an arithmetic number, because the mean of its divisors is an integer number (12519990).

Almost surely, 2^90143874 is an apocalyptic number.

90143874 is an abundant number, since it is smaller than the sum of its proper divisors (110175966).

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

90143874 is a wasteful number, since it uses less digits than its factorization.

90143874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669342 (or 1669336 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 90143874 is about 9494.4127780500. The cubic root of 90143874 is about 448.3791466414.

The spelling of 90143874 in words is "ninety million, one hundred forty-three thousand, eight hundred seventy-four".