90861438 has 8 divisors (see below), whose sum is σ = 181722888. Its totient is φ = 30287144.

The previous prime is 90861427. The next prime is 90861443. The reversal of 90861438 is 83416809.

It is a sphenic number, since it is the product of 3 distinct primes.

90861438 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 90861396 and 90861405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7571781 + ... + 7571792.

It is an arithmetic number, because the mean of its divisors is an integer number (22715361).

Almost surely, 2^90861438 is an apocalyptic number.

90861438 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

90861438 is a wasteful number, since it uses less digits than its factorization.

90861438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15143578.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 90861438 is about 9532.1266252605. The cubic root of 90861438 is about 449.5657341394.

The spelling of 90861438 in words is "ninety million, eight hundred sixty-one thousand, four hundred thirty-eight".