407945978 has 16 divisors (see below), whose sum is σ = 676952640. Its totient is φ = 182817600.

The previous prime is 407945977. The next prime is 407945999. The reversal of 407945978 is 879549704.

It is not an unprimeable number, because it can be changed into a prime (407945977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129023 + ... + 132146.

It is an arithmetic number, because the mean of its divisors is an integer number (42309540).

Almost surely, 2^407945978 is an apocalyptic number.

407945978 is a deficient number, since it is larger than the sum of its proper divisors (269006662).

407945978 is a wasteful number, since it uses less digits than its factorization.

407945978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261253.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The square root of 407945978 is about 20197.6725886920. The cubic root of 407945978 is about 741.6532176383.

The spelling of 407945978 in words is "four hundred seven million, nine hundred forty-five thousand, nine hundred seventy-eight".