38402505 has 24 divisors (see below), whose sum is σ = 69031872. Its totient is φ = 20480688.

The previous prime is 38402491. The next prime is 38402537. The reversal of 38402505 is 50520483.

It is not a de Polignac number, because 38402505 - 2¹⁴ = 38386121 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14589 + ... + 17018.

It is an arithmetic number, because the mean of its divisors is an integer number (2876328).

Almost surely, 2^38402505 is an apocalyptic number.

It is an amenable number.

38402505 is a deficient number, since it is larger than the sum of its proper divisors (30629367).

38402505 is an equidigital number, since it uses as much as digits as its factorization.

38402505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31627 (or 31615 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 38402505 is about 6196.9754719540. The cubic root of 38402505 is about 337.3804020682.

Adding to 38402505 its reverse (50520483), we get a palindrome (88922988).

The spelling of 38402505 in words is "thirty-eight million, four hundred two thousand, five hundred five".