38720004 has 24 divisors (see below), whose sum is σ = 90447840. Its totient is φ = 12892224.

The previous prime is 38719987. The next prime is 38720009. The reversal of 38720004 is 40002783.

It is not an unprimeable number, because it can be changed into a prime (38720009) 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, 18432 + ... + 20424.

It is an arithmetic number, because the mean of its divisors is an integer number (3768660).

Almost surely, 2^38720004 is an apocalyptic number.

It is an amenable number.

38720004 is an abundant number, since it is smaller than the sum of its proper divisors (51727836).

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

38720004 is a wasteful number, since it uses less digits than its factorization.

38720004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3619 (or 3617 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 38720004 is about 6222.5399958538. The cubic root of 38720004 is about 338.3076339743.

Adding to 38720004 its reverse (40002783), we get a palindrome (78722787).

The spelling of 38720004 in words is "thirty-eight million, seven hundred twenty thousand, four".