38215812 has 12 divisors (see below), whose sum is σ = 89170256. Its totient is φ = 12738600.

The previous prime is 38215789. The next prime is 38215819. The reversal of 38215812 is 21851283.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 38215812.

It is not an unprimeable number, because it can be changed into a prime (38215819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1592314 + ... + 1592337.

Almost surely, 2^38215812 is an apocalyptic number.

It is an amenable number.

38215812 is an abundant number, since it is smaller than the sum of its proper divisors (50954444).

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

38215812 is a wasteful number, since it uses less digits than its factorization.

38215812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184658 (or 3184656 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The square root of 38215812 is about 6181.8938845632. The cubic root of 38215812 is about 336.8327910442.

The spelling of 38215812 in words is "thirty-eight million, two hundred fifteen thousand, eight hundred twelve".