39919980 has 48 divisors (see below), whose sum is σ = 112218624. Its totient is φ = 10603200.

The previous prime is 39919949. The next prime is 39919987. The reversal of 39919980 is 8991993.

It is not an unprimeable number, because it can be changed into a prime (39919987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15805 + ... + 18155.

It is an arithmetic number, because the mean of its divisors is an integer number (2337888).

Almost surely, 2^39919980 is an apocalyptic number.

39919980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39919980 is an abundant number, since it is smaller than the sum of its proper divisors (72298644).

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

39919980 is a wasteful number, since it uses less digits than its factorization.

39919980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646 (or 2644 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 48.

The square root of 39919980 is about 6318.2260168500. The cubic root of 39919980 is about 341.7669833001.

The spelling of 39919980 in words is "thirty-nine million, nine hundred nineteen thousand, nine hundred eighty".