400049997 has 32 divisors (see below), whose sum is σ = 583511040. Its totient is φ = 242928000.

The previous prime is 400049987. The next prime is 400050029. The reversal of 400049997 is 799940004.

It is not a de Polignac number, because 400049997 - 2⁷ = 400049869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400049977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164722 + ... + 167132.

It is an arithmetic number, because the mean of its divisors is an integer number (18234720).

Almost surely, 2^400049997 is an apocalyptic number.

It is an amenable number.

400049997 is a deficient number, since it is larger than the sum of its proper divisors (183461043).

400049997 is a wasteful number, since it uses less digits than its factorization.

400049997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2545.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 400049997 is about 20001.2498859446. The cubic root of 400049997 is about 736.8369968696.

The spelling of 400049997 in words is "four hundred million, forty-nine thousand, nine hundred ninety-seven".