39490020 has 36 divisors (see below), whose sum is σ = 119786940. Its totient is φ = 10530624.

The previous prime is 39489991. The next prime is 39490049. The reversal of 39490020 is 2009493.

It is an interprime number because it is at equal distance from previous prime (39489991) and next prime (39490049).

It can be written as a sum of positive squares in 2 ways, for example, as 19131876 + 20358144 = 4374^2 + 4512^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109515 + ... + 109874.

It is an arithmetic number, because the mean of its divisors is an integer number (3327415).

Almost surely, 2^39490020 is an apocalyptic number.

39490020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

39490020 is an abundant number, since it is smaller than the sum of its proper divisors (80296920).

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

39490020 is a wasteful number, since it uses less digits than its factorization.

39490020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219404 (or 219399 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 39490020 is about 6284.1085286618. The cubic root of 39490020 is about 340.5355458502.

The spelling of 39490020 in words is "thirty-nine million, four hundred ninety thousand, twenty".