38720001 has 4 divisors (see below), whose sum is σ = 51626672. Its totient is φ = 25813332.

The previous prime is 38719987. The next prime is 38720009. The reversal of 38720001 is 10002783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 38720001 - 2⁵ = 38719969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38720001.

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 3 ways as a sum of consecutive naturals, for example, 6453331 + ... + 6453336.

It is an arithmetic number, because the mean of its divisors is an integer number (12906668).

Almost surely, 2^38720001 is an apocalyptic number.

It is an amenable number.

38720001 is a deficient number, since it is larger than the sum of its proper divisors (12906671).

38720001 is a wasteful number, since it uses less digits than its factorization.

38720001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12906670.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 38720001 is about 6222.5397547947. The cubic root of 38720001 is about 338.3076252370.

Adding to 38720001 its reverse (10002783), we get a palindrome (48722784).

The spelling of 38720001 in words is "thirty-eight million, seven hundred twenty thousand, one".