90318858 has 72 divisors (see below), whose sum is σ = 223427232. Its totient is φ = 24264576.

The previous prime is 90318829. The next prime is 90318863. The reversal of 90318858 is 85881309.

It is a super-2 number, since 2×90318858² = 16314992220848328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 84435 + ... + 85497.

It is an arithmetic number, because the mean of its divisors is an integer number (3103156).

Almost surely, 2^90318858 is an apocalyptic number.

90318858 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 90318858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111713616).

90318858 is an abundant number, since it is smaller than the sum of its proper divisors (133108374).

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

90318858 is a wasteful number, since it uses less digits than its factorization.

90318858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116 (or 1092 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The square root of 90318858 is about 9503.6234142563. The cubic root of 90318858 is about 448.6690848644.

The spelling of 90318858 in words is "ninety million, three hundred eighteen thousand, eight hundred fifty-eight".