406978325 has 24 divisors (see below), whose sum is σ = 544631808. Its totient is φ = 299897280.

The previous prime is 406978321. The next prime is 406978331. The reversal of 406978325 is 523879604.

It is not a de Polignac number, because 406978325 - 2² = 406978321 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406978321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 196244 + ... + 198306.

It is an arithmetic number, because the mean of its divisors is an integer number (22692992).

Almost surely, 2^406978325 is an apocalyptic number.

It is an amenable number.

406978325 is a deficient number, since it is larger than the sum of its proper divisors (137653483).

406978325 is a wasteful number, since it uses less digits than its factorization.

406978325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693 (or 2688 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 406978325 is about 20173.7037997488. The cubic root of 406978325 is about 741.0663497817.

The spelling of 406978325 in words is "four hundred six million, nine hundred seventy-eight thousand, three hundred twenty-five".