38403977 has 4 divisors (see below), whose sum is σ = 38684436. Its totient is φ = 38123520.

The previous prime is 38403973. The next prime is 38403991. The reversal of 38403977 is 77930483.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16679056 + 21724921 = 4084^2 + 4661^2 .

It is a cyclic number.

It is not a de Polignac number, because 38403977 - 2² = 38403973 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38403973) 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, 140024 + ... + 140297.

It is an arithmetic number, because the mean of its divisors is an integer number (9671109).

Almost surely, 2^38403977 is an apocalyptic number.

It is an amenable number.

38403977 is a deficient number, since it is larger than the sum of its proper divisors (280459).

38403977 is a wasteful number, since it uses less digits than its factorization.

38403977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280458.

The product of its (nonzero) digits is 127008, while the sum is 41.

The square root of 38403977 is about 6197.0942384314. The cubic root of 38403977 is about 337.3847127037.

The spelling of 38403977 in words is "thirty-eight million, four hundred three thousand, nine hundred seventy-seven".