36399918 has 16 divisors (see below), whose sum is σ = 72996480. Its totient is φ = 12100536.

The previous prime is 36399911. The next prime is 36399919. The reversal of 36399918 is 81999363.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36399911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5730 + ... + 10277.

It is an arithmetic number, because the mean of its divisors is an integer number (4562280).

Almost surely, 2^36399918 is an apocalyptic number.

36399918 is an abundant number, since it is smaller than the sum of its proper divisors (36596562).

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

36399918 is a wasteful number, since it uses less digits than its factorization.

36399918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16391.

The product of its digits is 314928, while the sum is 48.

The square root of 36399918 is about 6033.2344559117. The cubic root of 36399918 is about 331.4109104066.

The spelling of 36399918 in words is "thirty-six million, three hundred ninety-nine thousand, nine hundred eighteen".