38001821 has 8 divisors (see below), whose sum is σ = 44645664. Its totient is φ = 31889520.

The previous prime is 38001811. The next prime is 38001833. The reversal of 38001821 is 12810083.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-38001821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38001811) 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, 132731 + ... + 133016.

It is an arithmetic number, because the mean of its divisors is an integer number (5580708).

Almost surely, 2^38001821 is an apocalyptic number.

It is an amenable number.

38001821 is a deficient number, since it is larger than the sum of its proper divisors (6643843).

38001821 is a wasteful number, since it uses less digits than its factorization.

38001821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265771.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 38001821 is about 6164.5617038034. The cubic root of 38001821 is about 336.2029109075.

The spelling of 38001821 in words is "thirty-eight million, one thousand, eight hundred twenty-one".