36181980 has 36 divisors (see below), whose sum is σ = 109752552. Its totient is φ = 9648480.

The previous prime is 36181979. The next prime is 36181997. The reversal of 36181980 is 8918163.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100326 + ... + 100685.

It is an arithmetic number, because the mean of its divisors is an integer number (3048682).

Almost surely, 2^36181980 is an apocalyptic number.

36181980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

36181980 is an abundant number, since it is smaller than the sum of its proper divisors (73570572).

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

36181980 is a wasteful number, since it uses less digits than its factorization.

36181980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201026 (or 201021 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 36181980 is about 6015.1458835177. The cubic root of 36181980 is about 330.7481647634.

The spelling of 36181980 in words is "thirty-six million, one hundred eighty-one thousand, nine hundred eighty".