38409261 has 16 divisors (see below), whose sum is σ = 55971648. Its totient is φ = 23235200.

The previous prime is 38409257. The next prime is 38409263. The reversal of 38409261 is 16290483.

It is a cyclic number.

It is not a de Polignac number, because 38409261 - 2² = 38409257 is a prime.

It is a super-2 number, since 2×38409261² = 2950542661132242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38409263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34465 + ... + 35561.

It is an arithmetic number, because the mean of its divisors is an integer number (3498228).

Almost surely, 2^38409261 is an apocalyptic number.

It is an amenable number.

38409261 is a deficient number, since it is larger than the sum of its proper divisors (17562387).

38409261 is a wasteful number, since it uses less digits than its factorization.

38409261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 38409261 is about 6197.5205526081. The cubic root of 38409261 is about 337.4001855723.

The spelling of 38409261 in words is "thirty-eight million, four hundred nine thousand, two hundred sixty-one".