39400020 has 216 divisors, whose sum is σ = 138264672. Its totient is φ = 9408960.

The previous prime is 39400007. The next prime is 39400021. The reversal of 39400020 is 2000493.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 39399966 and 39400002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39400021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 588027 + ... + 588093.

Almost surely, 2^39400020 is an apocalyptic number.

39400020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39400020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69132336).

39400020 is an abundant number, since it is smaller than the sum of its proper divisors (98864652).

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

39400020 is a wasteful number, since it uses less digits than its factorization.

39400020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 39400020 is about 6276.9435237224. The cubic root of 39400020 is about 340.2766491159.

The spelling of 39400020 in words is "thirty-nine million, four hundred thousand, twenty".