409997970 has 64 divisors (see below), whose sum is σ = 1095431040. Its totient is φ = 109122624.

The previous prime is 409997957. The next prime is 409998041. The reversal of 409997970 is 79799904.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181669 + ... + 183911.

It is an arithmetic number, because the mean of its divisors is an integer number (17116110).

Almost surely, 2^409997970 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 409997970, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (547715520).

409997970 is an abundant number, since it is smaller than the sum of its proper divisors (685433070).

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

409997970 is a wasteful number, since it uses less digits than its factorization.

409997970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936 (or 2930 counting only the distinct ones).

The product of its (nonzero) digits is 1285956, while the sum is 54.

The square root of 409997970 is about 20248.4066039775. The cubic root of 409997970 is about 742.8946580624.

The spelling of 409997970 in words is "four hundred nine million, nine hundred ninety-seven thousand, nine hundred seventy".