38078640 has 240 divisors, whose sum is σ = 141612960. Its totient is φ = 9400320.

The previous prime is 38078629. The next prime is 38078669. The reversal of 38078640 is 4687083.

38078640 is a `hidden beast` number, since 3 + 8 + 0 + 7 + 8 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 38078595 and 38078604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 624210 + ... + 624270.

It is an arithmetic number, because the mean of its divisors is an integer number (590054).

Almost surely, 2^38078640 is an apocalyptic number.

38078640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38078640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70806480).

38078640 is an abundant number, since it is smaller than the sum of its proper divisors (103534320).

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

38078640 is a wasteful number, since it uses less digits than its factorization.

38078640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 38078640 is about 6170.7892525997. The cubic root of 38078640 is about 336.4292982024.

The spelling of 38078640 in words is "thirty-eight million, seventy-eight thousand, six hundred forty".