38787840 has 432 divisors, whose sum is σ = 169635648. Its totient is φ = 7962624.

The previous prime is 38787817. The next prime is 38787871. The reversal of 38787840 is 4878783.

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

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, 1048302 + ... + 1048338.

Almost surely, 2^38787840 is an apocalyptic number.

38787840 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 38787840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84817824).

38787840 is an abundant number, since it is smaller than the sum of its proper divisors (130847808).

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

38787840 is a wasteful number, since it uses less digits than its factorization.

38787840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 38787840 is about 6227.9884392956. The cubic root of 38787840 is about 338.5050861535.

The spelling of 38787840 in words is "thirty-eight million, seven hundred eighty-seven thousand, eight hundred forty".