90218612 has 48 divisors (see below), whose sum is σ = 182407680. Its totient is φ = 38613600.

The previous prime is 90218603. The next prime is 90218621. The reversal of 90218612 is 21681209.

It is an interprime number because it is at equal distance from previous prime (90218603) and next prime (90218621).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259823 + ... + 260169.

It is an arithmetic number, because the mean of its divisors is an integer number (3800160).

Almost surely, 2^90218612 is an apocalyptic number.

It is an amenable number.

90218612 is an abundant number, since it is smaller than the sum of its proper divisors (92189068).

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

90218612 is a wasteful number, since it uses less digits than its factorization.

90218612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 90218612 is about 9498.3478563380. The cubic root of 90218612 is about 448.5030289870.

The spelling of 90218612 in words is "ninety million, two hundred eighteen thousand, six hundred twelve".