38781980 has 48 divisors (see below), whose sum is σ = 83692224. Its totient is φ = 15091200.

The previous prime is 38781949. The next prime is 38782027. The reversal of 38781980 is 8918783.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147329 + ... + 147591.

It is an arithmetic number, because the mean of its divisors is an integer number (1743588).

Almost surely, 2^38781980 is an apocalyptic number.

It is an amenable number.

38781980 is an abundant number, since it is smaller than the sum of its proper divisors (44910244).

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

38781980 is a wasteful number, since it uses less digits than its factorization.

38781980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 38781980 is about 6227.5179646469. The cubic root of 38781980 is about 338.4880383733.

The spelling of 38781980 in words is "thirty-eight million, seven hundred eighty-one thousand, nine hundred eighty".