1405556946 has 12 divisors (see below), whose sum is σ = 3045373422. Its totient is φ = 468518976.

The previous prime is 1405556903. The next prime is 1405556951. The reversal of 1405556946 is 6496555041.

1405556946 is a `hidden beast` number, since 1 + 4 + 0 + 5 + 556 + 94 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 823058721 + 582498225 = 28689^2 + 24135^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39043231 + ... + 39043266.

Almost surely, 2^1405556946 is an apocalyptic number.

1405556946 is an abundant number, since it is smaller than the sum of its proper divisors (1639816476).

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

1405556946 is a wasteful number, since it uses less digits than its factorization.

1405556946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78086505 (or 78086502 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The square root of 1405556946 is about 37490.7581411739. The cubic root of 1405556946 is about 1120.1671056998.

The spelling of 1405556946 in words is "one billion, four hundred five million, five hundred fifty-six thousand, nine hundred forty-six".