38561980 has 12 divisors (see below), whose sum is σ = 80980200. Its totient is φ = 15424784.

The previous prime is 38561947. The next prime is 38561981. The reversal of 38561980 is 8916583.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38561981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964030 + ... + 964069.

It is an arithmetic number, because the mean of its divisors is an integer number (6748350).

Almost surely, 2^38561980 is an apocalyptic number.

It is an amenable number.

38561980 is an abundant number, since it is smaller than the sum of its proper divisors (42418220).

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

38561980 is a wasteful number, since it uses less digits than its factorization.

38561980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928108 (or 1928106 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 38561980 is about 6209.8293052225. The cubic root of 38561980 is about 337.8467729782.

The spelling of 38561980 in words is "thirty-eight million, five hundred sixty-one thousand, nine hundred eighty".