38401405 has 16 divisors (see below), whose sum is σ = 54365184. Its totient is φ = 25482240.

The previous prime is 38401399. The next prime is 38401409. The reversal of 38401405 is 50410483.

It is not a de Polignac number, because 38401405 - 2⁵ = 38401373 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38401405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38401409) 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, 16612 + ... + 18781.

It is an arithmetic number, because the mean of its divisors is an integer number (3397824).

Almost surely, 2^38401405 is an apocalyptic number.

38401405 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38401405 is a deficient number, since it is larger than the sum of its proper divisors (15963779).

38401405 is a wasteful number, since it uses less digits than its factorization.

38401405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35436.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 38401405 is about 6196.8867183449. The cubic root of 38401405 is about 337.3771807333.

Adding to 38401405 its reverse (50410483), we get a palindrome (88811888).

The spelling of 38401405 in words is "thirty-eight million, four hundred one thousand, four hundred five".