38781798 has 16 divisors (see below), whose sum is σ = 84614976. Its totient is φ = 11752040.

The previous prime is 38781797. The next prime is 38781851. The reversal of 38781798 is 89718783.

It is a super-2 number, since 2×38781798² = 3008055712225608, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38781798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38781797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293736 + ... + 293867.

It is an arithmetic number, because the mean of its divisors is an integer number (5288436).

Almost surely, 2^38781798 is an apocalyptic number.

38781798 is an abundant number, since it is smaller than the sum of its proper divisors (45833178).

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

38781798 is a wasteful number, since it uses less digits than its factorization.

38781798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587619.

The product of its digits is 677376, while the sum is 51.

The square root of 38781798 is about 6227.5033520665. The cubic root of 38781798 is about 338.4875088755.

The spelling of 38781798 in words is "thirty-eight million, seven hundred eighty-one thousand, seven hundred ninety-eight".