415491978 has 24 divisors (see below), whose sum is σ = 913397184. Its totient is φ = 125906440.

The previous prime is 415491971. The next prime is 415491997. The reversal of 415491978 is 879194514.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (415491971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 285426 + ... + 286877.

It is an arithmetic number, because the mean of its divisors is an integer number (38058216).

Almost surely, 2^415491978 is an apocalyptic number.

415491978 is an abundant number, since it is smaller than the sum of its proper divisors (497905206).

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

415491978 is a wasteful number, since it uses less digits than its factorization.

415491978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572330 (or 572319 counting only the distinct ones).

The product of its digits is 362880, while the sum is 48.

The square root of 415491978 is about 20383.6203359462. The cubic root of 415491978 is about 746.1982297304.

The spelling of 415491978 in words is "four hundred fifteen million, four hundred ninety-one thousand, nine hundred seventy-eight".