400016949 has 8 divisors (see below), whose sum is σ = 538076352. Its totient is φ = 264317760.

The previous prime is 400016941. The next prime is 400016977. The reversal of 400016949 is 949610004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400016949 - 2³ = 400016941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400016941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589657 + ... + 590334.

It is an arithmetic number, because the mean of its divisors is an integer number (67259544).

Almost surely, 2^400016949 is an apocalyptic number.

It is an amenable number.

400016949 is a deficient number, since it is larger than the sum of its proper divisors (138059403).

400016949 is a wasteful number, since it uses less digits than its factorization.

400016949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180107.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 400016949 is about 20000.4237205115. The cubic root of 400016949 is about 736.8167063561.

The spelling of 400016949 in words is "four hundred million, sixteen thousand, nine hundred forty-nine".