38661545 has 8 divisors (see below), whose sum is σ = 49962696. Its totient is φ = 28550016.

The previous prime is 38661541. The next prime is 38661547. The reversal of 38661545 is 54516683.

38661545 = 739² + 740² + ... + 803².

It can be written as a sum of positive squares in 4 ways, for example, as 678976 + 37982569 = 824^2 + 6163^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 38661545 - 2² = 38661541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38661499 and 38661508.

It is not an unprimeable number, because it can be changed into a prime (38661541) 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, 297332 + ... + 297461.

It is an arithmetic number, because the mean of its divisors is an integer number (6245337).

Almost surely, 2^38661545 is an apocalyptic number.

It is an amenable number.

38661545 is a deficient number, since it is larger than the sum of its proper divisors (11301151).

38661545 is a wasteful number, since it uses less digits than its factorization.

38661545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594811.

The product of its digits is 86400, while the sum is 38.

The square root of 38661545 is about 6217.8408631936. The cubic root of 38661545 is about 338.1372906085.

The spelling of 38661545 in words is "thirty-eight million, six hundred sixty-one thousand, five hundred forty-five".