38518140 has 24 divisors (see below), whose sum is σ = 107850960. Its totient is φ = 10271488.

The previous prime is 38518127. The next prime is 38518163. The reversal of 38518140 is 4181583.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 38518098 and 38518107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320925 + ... + 321044.

It is an arithmetic number, because the mean of its divisors is an integer number (4493790).

Almost surely, 2^38518140 is an apocalyptic number.

38518140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38518140 is an abundant number, since it is smaller than the sum of its proper divisors (69332820).

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

38518140 is a wasteful number, since it uses less digits than its factorization.

38518140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641981 (or 641979 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 38518140 is about 6206.2984137084. The cubic root of 38518140 is about 337.7186950209.

The spelling of 38518140 in words is "thirty-eight million, five hundred eighteen thousand, one hundred forty".