38640148 has 24 divisors (see below), whose sum is σ = 71416800. Its totient is φ = 18242208.

The previous prime is 38640143. The next prime is 38640149. The reversal of 38640148 is 84104683.

It is a super-2 number, since 2×38640148² = 2986122074923808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38640143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28911 + ... + 30217.

It is an arithmetic number, because the mean of its divisors is an integer number (2975700).

Almost surely, 2^38640148 is an apocalyptic number.

38640148 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

38640148 is a deficient number, since it is larger than the sum of its proper divisors (32776652).

38640148 is a wasteful number, since it uses less digits than its factorization.

38640148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719 (or 1717 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 38640148 is about 6216.1200117115. The cubic root of 38640148 is about 338.0748990791.

The spelling of 38640148 in words is "thirty-eight million, six hundred forty thousand, one hundred forty-eight".