39970000 has 100 divisors (see below), whose sum is σ = 110789536. Its totient is φ = 13680000.

The previous prime is 39969991. The next prime is 39970001. The reversal of 39970000 is 7993.

It is a tau number, because it is divible by the number of its divisors (100).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39970001) 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 19 ways as a sum of consecutive naturals, for example, 69715 + ... + 70285.

Almost surely, 2^39970000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39970000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55394768).

39970000 is an abundant number, since it is smaller than the sum of its proper divisors (70819536).

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

39970000 is an equidigital number, since it uses as much as digits as its factorization.

39970000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 1701, while the sum is 28.

The square root of 39970000 is about 6322.1831672295. The cubic root of 39970000 is about 341.9096691544.

Adding to 39970000 its reverse (7993), we get a palindrome (39977993).

The spelling of 39970000 in words is "thirty-nine million, nine hundred seventy thousand".