1405938897 has 32 divisors (see below), whose sum is σ = 2315122560. Its totient is φ = 835997760.

The previous prime is 1405938893. The next prime is 1405938923. The reversal of 1405938897 is 7988395041.

1405938897 is a `hidden beast` number, since 1 + 40 + 593 + 8 + 8 + 9 + 7 = 666.

It is not a de Polignac number, because 1405938897 - 2² = 1405938893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1405938893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28918 + ... + 60399.

It is an arithmetic number, because the mean of its divisors is an integer number (72347580).

Almost surely, 2^1405938897 is an apocalyptic number.

It is an amenable number.

1405938897 is a deficient number, since it is larger than the sum of its proper divisors (909183663).

1405938897 is a wasteful number, since it uses less digits than its factorization.

1405938897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89390 (or 89384 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The square root of 1405938897 is about 37495.8517305581. The cubic root of 1405938897 is about 1120.2685625632.

The spelling of 1405938897 in words is "one billion, four hundred five million, nine hundred thirty-eight thousand, eight hundred ninety-seven".