38798640 has 60 divisors (see below), whose sum is σ = 130301184. Its totient is φ = 10346112.

The previous prime is 38798633. The next prime is 38798647. The reversal of 38798640 is 4689783.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (38798633) and next prime (38798647).

It is a tau number, because it is divible by the number of its divisors (60).

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

It is not an unprimeable number, because it can be changed into a prime (38798647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26224 + ... + 27663.

Almost surely, 2^38798640 is an apocalyptic number.

38798640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38798640 is an abundant number, since it is smaller than the sum of its proper divisors (91502544).

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

38798640 is a wasteful number, since it uses less digits than its factorization.

38798640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53906 (or 53897 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 38798640 is about 6228.8554325815. The cubic root of 38798640 is about 338.5365007727.

The spelling of 38798640 in words is "thirty-eight million, seven hundred ninety-eight thousand, six hundred forty".