405097890 has 32 divisors (see below), whose sum is σ = 972838080. Its totient is φ = 107959104.

The previous prime is 405097871. The next prime is 405097907. The reversal of 405097890 is 98790504.

It is a Curzon number.

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, 62272 + ... + 68468.

It is an arithmetic number, because the mean of its divisors is an integer number (30401190).

Almost surely, 2^405097890 is an apocalyptic number.

405097890 is an abundant number, since it is smaller than the sum of its proper divisors (567740190).

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

405097890 is a wasteful number, since it uses less digits than its factorization.

405097890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8386.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 405097890 is about 20127.0437471577. The cubic root of 405097890 is about 739.9232267564.

The spelling of 405097890 in words is "four hundred five million, ninety-seven thousand, eight hundred ninety".