90143612 has 24 divisors (see below), whose sum is σ = 172220496. Its totient is φ = 41033088.

The previous prime is 90143587. The next prime is 90143623. The reversal of 90143612 is 21634109.

It is a Harshad number since it is a multiple of its sum of digits (26).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8078 + ... + 15669.

It is an arithmetic number, because the mean of its divisors is an integer number (7175854).

Almost surely, 2^90143612 is an apocalyptic number.

It is an amenable number.

90143612 is a deficient number, since it is larger than the sum of its proper divisors (82076884).

90143612 is a wasteful number, since it uses less digits than its factorization.

90143612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23837 (or 23835 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 90143612 is about 9494.3989804516. The cubic root of 90143612 is about 448.3787122416.

The spelling of 90143612 in words is "ninety million, one hundred forty-three thousand, six hundred twelve".