38397816 has 24 divisors (see below), whose sum is σ = 103994280. Its totient is φ = 12799248.

The previous prime is 38397791. The next prime is 38397817. The reversal of 38397816 is 61879383.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38397817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 266580 + ... + 266723.

It is an arithmetic number, because the mean of its divisors is an integer number (4333095).

Almost surely, 2^38397816 is an apocalyptic number.

38397816 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

38397816 is an abundant number, since it is smaller than the sum of its proper divisors (65596464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38397816 is a wasteful number, since it uses less digits than its factorization.

38397816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533315 (or 533308 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 38397816 is about 6196.5971306839. The cubic root of 38397816 is about 337.3666699684.

The spelling of 38397816 in words is "thirty-eight million, three hundred ninety-seven thousand, eight hundred sixteen".