38215920 has 40 divisors (see below), whose sum is σ = 118470096. Its totient is φ = 10190848.

The previous prime is 38215883. The next prime is 38215927. The reversal of 38215920 is 2951283.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38215927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79377 + ... + 79856.

Almost surely, 2^38215920 is an apocalyptic number.

38215920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38215920 is an abundant number, since it is smaller than the sum of its proper divisors (80254176).

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

38215920 is a wasteful number, since it uses less digits than its factorization.

38215920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159249 (or 159243 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 38215920 is about 6181.9026197442. The cubic root of 38215920 is about 336.8331083466.

The spelling of 38215920 in words is "thirty-eight million, two hundred fifteen thousand, nine hundred twenty".