38649555 has 40 divisors (see below), whose sum is σ = 79186272. Its totient is φ = 17667072.

The previous prime is 38649521. The next prime is 38649599. The reversal of 38649555 is 55594683.

38649555 is a `hidden beast` number, since 38 + 64 + 9 + 555 = 666.

It is not a de Polignac number, because 38649555 - 2⁶ = 38649491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 38649555.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3982 + ... + 9651.

Almost surely, 2^38649555 is an apocalyptic number.

38649555 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

38649555 is an abundant number, since it is smaller than the sum of its proper divisors (40536717).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38649555 is a wasteful number, since it uses less digits than its factorization.

38649555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13657 (or 13648 counting only the distinct ones).

The product of its digits is 648000, while the sum is 45.

The square root of 38649555 is about 6216.8766273749. The cubic root of 38649555 is about 338.1023317943.

It can be divided in two parts, 38649 and 555, that added together give a square (39204 = 198²).

The spelling of 38649555 in words is "thirty-eight million, six hundred forty-nine thousand, five hundred fifty-five".