39958020 has 36 divisors (see below), whose sum is σ = 121206540. Its totient is φ = 10655424.

The previous prime is 39958001. The next prime is 39958021. The reversal of 39958020 is 2085993.

It can be written as a sum of positive squares in 2 ways, for example, as 29615364 + 10342656 = 5442^2 + 3216^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (39958021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110815 + ... + 111174.

Almost surely, 2^39958020 is an apocalyptic number.

39958020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39958020 is an abundant number, since it is smaller than the sum of its proper divisors (81248520).

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

39958020 is a wasteful number, since it uses less digits than its factorization.

39958020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222004 (or 221999 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 39958020 is about 6321.2356387023. The cubic root of 39958020 is about 341.8755061393.

The spelling of 39958020 in words is "thirty-nine million, nine hundred fifty-eight thousand, twenty".