90218429 has 16 divisors (see below), whose sum is σ = 106119552. Its totient is φ = 75091968.

The previous prime is 90218413. The next prime is 90218459. The reversal of 90218429 is 92481209.

It is not a de Polignac number, because 90218429 - 2⁴ = 90218413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90218459) 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, 57317 + ... + 58869.

It is an arithmetic number, because the mean of its divisors is an integer number (6632472).

Almost surely, 2^90218429 is an apocalyptic number.

It is an amenable number.

90218429 is a deficient number, since it is larger than the sum of its proper divisors (15901123).

90218429 is a wasteful number, since it uses less digits than its factorization.

90218429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 90218429 is about 9498.3382230788. The cubic root of 90218429 is about 448.5027257380.

The spelling of 90218429 in words is "ninety million, two hundred eighteen thousand, four hundred twenty-nine".