36438390 has 64 divisors (see below), whose sum is σ = 102297600. Its totient is φ = 9204192.

The previous prime is 36438379. The next prime is 36438403. The reversal of 36438390 is 9383463.

36438390 is a `hidden beast` number, since 3 + 643 + 8 + 3 + 9 + 0 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1579 + ... + 8681.

It is an arithmetic number, because the mean of its divisors is an integer number (1598400).

Almost surely, 2^36438390 is an apocalyptic number.

36438390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 36438390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51148800).

36438390 is an abundant number, since it is smaller than the sum of its proper divisors (65859210).

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

36438390 is a wasteful number, since it uses less digits than its factorization.

36438390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7138 (or 7132 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 36438390 is about 6036.4219534423. The cubic root of 36438390 is about 331.5276281717.

The spelling of 36438390 in words is "thirty-six million, four hundred thirty-eight thousand, three hundred ninety".