36988381 has 4 divisors (see below), whose sum is σ = 37195200. Its totient is φ = 36781564.

The previous prime is 36988361. The next prime is 36988397. The reversal of 36988381 is 18388963.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18388963 = 37 ⋅496999.

It is a cyclic number.

It is not a de Polignac number, because 36988381 - 2⁵ = 36988349 is a prime.

It is a super-2 number, since 2×36988381² = 2736280658002322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36988351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103141 + ... + 103498.

It is an arithmetic number, because the mean of its divisors is an integer number (9298800).

Almost surely, 2^36988381 is an apocalyptic number.

It is an amenable number.

36988381 is a deficient number, since it is larger than the sum of its proper divisors (206819).

36988381 is a wasteful number, since it uses less digits than its factorization.

36988381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206818.

The product of its digits is 248832, while the sum is 46.

The square root of 36988381 is about 6081.8073793898. The cubic root of 36988381 is about 333.1873012555.

The spelling of 36988381 in words is "thirty-six million, nine hundred eighty-eight thousand, three hundred eighty-one".