35720040 has 64 divisors (see below), whose sum is σ = 107775360. Its totient is φ = 9470720.

The previous prime is 35720021. The next prime is 35720051. The reversal of 35720040 is 4002753.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 35719989 and 35720016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22885 + ... + 24395.

It is an arithmetic number, because the mean of its divisors is an integer number (1683990).

Almost surely, 2^35720040 is an apocalyptic number.

35720040 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 35720040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53887680).

35720040 is an abundant number, since it is smaller than the sum of its proper divisors (72055320).

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

35720040 is a wasteful number, since it uses less digits than its factorization.

35720040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722 (or 1718 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 35720040 is about 5976.6244653650. The cubic root of 35720040 is about 329.3345635662.

Adding to 35720040 its reverse (4002753), we get a palindrome (39722793).

The spelling of 35720040 in words is "thirty-five million, seven hundred twenty thousand, forty".