38978061 has 4 divisors (see below), whose sum is σ = 51970752. Its totient is φ = 25985372.

The previous prime is 38978033. The next prime is 38978089. The reversal of 38978061 is 16087983.

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 an interprime number because it is at equal distance from previous prime (38978033) and next prime (38978089).

It is a cyclic number.

It is not a de Polignac number, because 38978061 - 2⁵ = 38978029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38978461) 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, 6496341 + ... + 6496346.

It is an arithmetic number, because the mean of its divisors is an integer number (12992688).

Almost surely, 2^38978061 is an apocalyptic number.

It is an amenable number.

38978061 is a deficient number, since it is larger than the sum of its proper divisors (12992691).

38978061 is a wasteful number, since it uses less digits than its factorization.

38978061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12992690.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 38978061 is about 6243.2412255174. The cubic root of 38978061 is about 339.0575428116.

The spelling of 38978061 in words is "thirty-eight million, nine hundred seventy-eight thousand, sixty-one".