38436981 has 24 divisors (see below), whose sum is σ = 59307360. Its totient is φ = 22065120.

The previous prime is 38436973. The next prime is 38436989. The reversal of 38436981 is 18963483.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (38436973) and next prime (38436989).

It is not a de Polignac number, because 38436981 - 2³ = 38436973 is a prime.

It is a super-2 number, since 2×38436981² = 2954803016788722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38436989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4111 + ... + 9683.

It is an arithmetic number, because the mean of its divisors is an integer number (2471140).

Almost surely, 2^38436981 is an apocalyptic number.

It is an amenable number.

38436981 is a deficient number, since it is larger than the sum of its proper divisors (20870379).

38436981 is a wasteful number, since it uses less digits than its factorization.

38436981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5617 (or 5606 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 38436981 is about 6199.7565274775. The cubic root of 38436981 is about 337.4813333983.

The spelling of 38436981 in words is "thirty-eight million, four hundred thirty-six thousand, nine hundred eighty-one".