38400015 has 16 divisors (see below), whose sum is σ = 61538400. Its totient is φ = 20447232.

The previous prime is 38399983. The next prime is 38400023. The reversal of 38400015 is 51000483.

It is not a de Polignac number, because 38400015 - 2⁵ = 38399983 is a prime.

It is a super-2 number, since 2×38400015² = 2949122304000450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 38399964 and 38400000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9871 + ... + 13199.

It is an arithmetic number, because the mean of its divisors is an integer number (3846150).

Almost surely, 2^38400015 is an apocalyptic number.

38400015 is a deficient number, since it is larger than the sum of its proper divisors (23138385).

38400015 is a wasteful number, since it uses less digits than its factorization.

38400015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4106.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 38400015 is about 6196.7745642390. The cubic root of 38400015 is about 337.3731100495.

Adding to 38400015 its reverse (51000483), we get a palindrome (89400498).

It can be divided in two parts, 384000 and 15, that multiplied together give a square (5760000 = 2400²).

The spelling of 38400015 in words is "thirty-eight million, four hundred thousand, fifteen".