36689840 has 80 divisors (see below), whose sum is σ = 93985056. Its totient is φ = 13209600.

The previous prime is 36689839. The next prime is 36689867. The reversal of 36689840 is 4898663.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×36689840² = 2692288718451200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 36689791 and 36689800.

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, 152120 + ... + 152360.

Almost surely, 2^36689840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36689840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46992528).

36689840 is an abundant number, since it is smaller than the sum of its proper divisors (57295216).

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

36689840 is a wasteful number, since it uses less digits than its factorization.

36689840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 36689840 is about 6057.2138809852. The cubic root of 36689840 is about 332.2884704289.

The spelling of 36689840 in words is "thirty-six million, six hundred eighty-nine thousand, eight hundred forty".